Tolto un controllo inutile sul nome che finisce con .pdf

Change get backend method for Lattice and run tests

.coveragerc

@@ -1,3 +1,2 @@
 [run]
 branch = True
-omit = camelot/ext/*

.editorconfig

@@ -1,10 +0,0 @@
-root = true
-
-[*]
-end_of_line = lf
-insert_final_newline = true
-
-[*.py]
-charset = utf-8
-indent_style = space
-indent_size = 4

.github/FUNDING.yml

@@ -0,0 +1 @@
+open_collective: camelot

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,57 @@
+---
+name: Bug report
+about: Please follow this template to submit bug reports.
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+<!-- Please read the filing issues section of the contributor's guide first: https://camelot-py.readthedocs.io/en/master/dev/contributing.html -->
+
+**Describe the bug**
+
+<!-- A clear and concise description of what the bug is. -->
+
+**Steps to reproduce the bug**
+
+<!-- Steps used to install `camelot`:
+1. Add step here (you can add more steps too) -->
+
+<!-- Steps to be used to reproduce behavior:
+1. Add step here (you can add more steps too) -->
+
+**Expected behavior**
+
+<!-- A clear and concise description of what you expected to happen. -->
+
+**Code**
+
+<!-- Add the Camelot code snippet that you used. -->
+
+```
+import camelot
+
+# add your code here
+```
+
+**PDF**
+
+<!-- Add the PDF file that you want to extract tables from. -->
+
+**Screenshots**
+
+<!-- If applicable, add screenshots to help explain your problem. -->
+
+**Environment**
+
+- OS: [e.g. macOS]
+- Python version:
+- Numpy version:
+- OpenCV version:
+- Ghostscript version:
+- Camelot version:
+
+**Additional context**
+
+<!-- Add any other context about the problem here. -->

.github/workflows/tests.yml

@@ -0,0 +1,44 @@
+name: tests
+
+on: [pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.6, 3.7, 3.8]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install camelot with dependencies
+        run: |
+          make install
+      - name: Test with pytest
+        run: |
+          make test
+
+  test_latest:
+    name: Test on ${{ matrix.os }} with Python 3.9
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        python-version: [3.9]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install camelot with dependencies
+        run: |
+          make install
+      - name: Test with pytest
+        run: |
+          make test

.gitignore

@@ -1,3 +1,4 @@
+fontconfig/
 __pycache__/
 *.py[cod]
 *.so
@@ -12,5 +13,8 @@ coverage.xml
 .pytest_cache/
 _build/
 
+.venv/
+htmlcov/
+
 # vscode
 .vscode

.readthedocs.yml

@@ -0,0 +1,27 @@
+# .readthedocs.yml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+  configuration: docs/conf.py
+
+# Build documentation with MkDocs
+#mkdocs:
+#  configuration: mkdocs.yml
+
+# Optionally build your docs in additional formats such as PDF
+formats:
+  - pdf
+
+# Optionally set the version of Python and requirements required to build your docs
+python:
+  version: 3.8
+  install:
+    - method: pip
+      path: .
+      extra_requirements:
+        - dev

.travis.yml

@@ -1,32 +0,0 @@
-sudo: true
-language: python
-cache: pip
-addons:
-  apt:
-    update: true
-install:
-  - make install
-jobs:
-  include:
-    - stage: test
-      script:
-        - make test
-      python: '2.7'
-    - stage: test
-      script:
-        - make test
-      python: '3.5'
-    - stage: test
-      script:
-        - make test
-      python: '3.6'
-    - stage: test
-      script:
-        - make test
-      python: '3.7'
-      dist: xenial
-    - stage: coverage
-      python: '3.6'
-      script:
-        - make test
-        - codecov --verbose

CONTRIBUTING.md

@@ -16,14 +16,14 @@ As the [Requests Code Of Conduct](http://docs.python-requests.org/en/master/dev/
 
 ## Your first contribution
 
-A great way to start contributing to Camelot is to pick an issue tagged with the [help wanted](https://github.com/socialcopsdev/camelot/labels/help%20wanted) tag or the [good first issue](https://github.com/socialcopsdev/camelot/labels/good%20first%20issue) tag. If you're unable to find a good first issue, feel free to contact the maintainer.
+A great way to start contributing to Camelot is to pick an issue tagged with the [help wanted](https://github.com/camelot-dev/camelot/labels/help%20wanted) tag or the [good first issue](https://github.com/camelot-dev/camelot/labels/good%20first%20issue) tag. If you're unable to find a good first issue, feel free to contact the maintainer.
 
 ## Setting up a development environment
 
 To install the dependencies needed for development, you can use pip:
 
 <pre>
-$ pip install camelot-py[dev]
+$ pip install "camelot-py[dev]"
 </pre>
 
 Alternatively, you can clone the project repository, and install using pip:
@@ -36,7 +36,7 @@ $ pip install ".[dev]"
 
 ### Submit a pull request
 
-The preferred workflow for contributing to Camelot is to fork the [project repository](https://github.com/socialcopsdev/camelot) on GitHub, clone, develop on a branch and then finally submit a pull request. Here are the steps:
+The preferred workflow for contributing to Camelot is to fork the [project repository](https://github.com/camelot-dev/camelot) on GitHub, clone, develop on a branch and then finally submit a pull request. Here are the steps:
 
 1. Fork the project repository. Click on the ‘Fork’ button near the top of the page. This creates a copy of the code under your account on the GitHub.
 
@@ -106,7 +106,7 @@ The function docstrings are written using the [numpydoc](https://numpydoc.readth
 
 ## Filing Issues
 
-We use [GitHub issues](https://github.com/socialcopsdev/camelot/issues) to keep track of all issues and pull requests. Before opening an issue (which asks a question or reports a bug), please use GitHub search to look for existing issues (both open and closed) that may be similar.
+We use [GitHub issues](https://github.com/camelot-dev/camelot/issues) to keep track of all issues and pull requests. Before opening an issue (which asks a question or reports a bug), please use GitHub search to look for existing issues (both open and closed) that may be similar.
 
 ### Questions
 

HISTORY.md

@@ -4,6 +4,109 @@ Release History
 master
 ------
 
+0.10.1 (2021-07-11)
+------------------
+
+- Change extra requirements from `cv` to `base`. You can use `pip install "camelot-py[base]"` to install everything required to run camelot.
+
+0.10.0 (2021-07-11)
+------------------
+
+**Improvements**
+
+- Add support for multiple image conversion backends. [#198](https://github.com/camelot-dev/camelot/pull/198) and [#253](https://github.com/camelot-dev/camelot/pull/253) by Vinayak Mehta.
+- Add markdown export format. [#222](https://github.com/camelot-dev/camelot/pull/222/) by [Lucas Cimon](https://github.com/Lucas-C).
+
+**Documentation**
+
+- Add faq section. [#216](https://github.com/camelot-dev/camelot/pull/216) by [Stefano Fiorucci](https://github.com/anakin87).
+
+0.9.0 (2021-06-15)
+------------------
+
+**Bugfixes**
+
+- Fix use of resolution argument to generate image with ghostscript. [#231](https://github.com/camelot-dev/camelot/pull/231) by [Tiago Samaha Cordeiro](https://github.com/tiagosamaha).
+- [#15](https://github.com/camelot-dev/camelot/issues/15) Fix duplicate strings being assigned to the same cell. [#206](https://github.com/camelot-dev/camelot/pull/206) by [Eduardo Gonzalez Lopez de Murillas](https://github.com/edugonza).
+- Save plot when filename is specified. [#121](https://github.com/camelot-dev/camelot/pull/121) by [Jens Diemer](https://github.com/jedie).
+- Close file streams explicitly. [#202](https://github.com/camelot-dev/camelot/pull/202) by [Martin Abente Lahaye](https://github.com/tchx84).
+- Use correct re.sub signature. [#186](https://github.com/camelot-dev/camelot/pull/186) by [pevisscher](https://github.com/pevisscher).
+- [#183](https://github.com/camelot-dev/camelot/issues/183) Fix UnicodeEncodeError when using Stream flavor by adding encoding kwarg to `to_html`. [#188](https://github.com/camelot-dev/camelot/pull/188) by [Stefano Fiorucci](https://github.com/anakin87).
+- [#179](https://github.com/camelot-dev/camelot/issues/179) Fix `max() arg is an empty sequence` error on PDFs with blank pages. [#189](https://github.com/camelot-dev/camelot/pull/189) by Vinayak Mehta.
+
+**Improvements**
+
+- Add `line_overlap` and `boxes_flow` to `LAParams`. [#219](https://github.com/camelot-dev/camelot/pull/219) by [Arnie97](https://github.com/Arnie97).
+- [Add bug report template.](https://github.com/camelot-dev/camelot/commit/0a3944e54d133b701edfe9c7546ff11289301ba8)
+- Move from [Travis to GitHub Actions](https://github.com/camelot-dev/camelot/pull/241).
+- Update `.readthedocs.yml` and [remove requirements.txt](https://github.com/camelot-dev/camelot/commit/7ab5db39d07baa4063f975e9e00f6073340e04c1#diff-cde814ef2f549dc093f5b8fc533b7e8f47e7b32a8081e0760e57d5c25a1139d9)
+
+**Documentation**
+
+- [#193](https://github.com/camelot-dev/camelot/issues/193) Add better checks to confirm proper installation of ghostscript. [#196](https://github.com/camelot-dev/camelot/pull/196) by [jimhall](https://github.com/jimhall).
+- Update `advanced.rst` plotting examples. [#119](https://github.com/camelot-dev/camelot/pull/119) by [Jens Diemer](https://github.com/jedie).
+
+0.8.2 (2020-07-27)
+------------------
+
+* Revert the changes in `0.8.1`.
+
+0.8.1 (2020-07-21)
+------------------
+
+**Bugfixes**
+
+* [#169](https://github.com/camelot-dev/camelot/issues/169) Fix import error caused by `pdfminer.six==20200720`. [#171](https://github.com/camelot-dev/camelot/pull/171) by Vinayak Mehta.
+
+0.8.0 (2020-05-24)
+------------------
+
+**Improvements**
+
+* Drop Python 2 support!
+    * Remove Python 2.7 and 3.5 support.
+    * Replace all instances of `.format` with f-strings.
+    * Remove all `__future__` imports.
+    * Fix HTTP 403 forbidden exception in read_pdf(url) and remove Python 2 urllib support.
+    * Fix test data.
+
+**Bugfixes**
+
+* Fix library discovery on Windows. [#32](https://github.com/camelot-dev/camelot/pull/32) by [KOLANICH](https://github.com/KOLANICH).
+* Fix calling convention of callback functions. [#34](https://github.com/camelot-dev/camelot/pull/34) by [KOLANICH](https://github.com/KOLANICH).
+
+0.7.3 (2019-07-07)
+------------------
+
+**Improvements**
+
+* Camelot now follows the Black code style! [#1](https://github.com/camelot-dev/camelot/pull/1) and [#3](https://github.com/camelot-dev/camelot/pull/3).
+
+**Bugfixes**
+
+* Fix Click.HelpFormatter monkey-patch. [#5](https://github.com/camelot-dev/camelot/pull/5) by [Dimiter Naydenov](https://github.com/dimitern).
+* Fix strip_text argument getting ignored. [#4](https://github.com/camelot-dev/camelot/pull/4) by [Dimiter Naydenov](https://github.com/dimitern).
+* [#25](https://github.com/camelot-dev/camelot/issues/25) edge_tol skipped in read_pdf. [#26](https://github.com/camelot-dev/camelot/pull/26) by Vinayak Mehta.
+* Fix pytest deprecation warning. [#2](https://github.com/camelot-dev/camelot/pull/2) by Vinayak Mehta.
+* [#293](https://github.com/socialcopsdev/camelot/issues/293) Split text ignores all text to the right of last cut. [#294](https://github.com/socialcopsdev/camelot/pull/294) by Vinayak Mehta.
+* [#277](https://github.com/socialcopsdev/camelot/issues/277) Sort TableList by order of tables in PDF. [#283](https://github.com/socialcopsdev/camelot/pull/283) by [Sym Roe](https://github.com/symroe).
+* [#312](https://github.com/socialcopsdev/camelot/issues/312) `table_regions` throws `ValueError` when `flavor='stream'`. [#332](https://github.com/socialcopsdev/camelot/pull/332) by Vinayak Mehta.
+
+0.7.2 (2019-01-10)
+------------------
+
+**Bugfixes**
+
+* [#245](https://github.com/socialcopsdev/camelot/issues/245) Fix AttributeError for encrypted files. [#251](https://github.com/socialcopsdev/camelot/pull/251) by Yatin Taluja.
+
+
+0.7.1 (2019-01-06)
+------------------
+
+**Bugfixes**
+
+* Move ghostscript import to inside the function so Anaconda builds don't fail.
+
 0.7.0 (2019-01-05)
 ------------------
 

LICENSE

@@ -1,6 +1,7 @@
 MIT License
 
-Copyright (c) 2018 Peeply Private Ltd (Singapore)
+Copyright (c) 2019-2021 Camelot Developers
+Copyright (c) 2018-2019 Peeply Private Ltd (Singapore)
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -1,27 +1,28 @@
 <p align="center">
-   <img src="https://raw.githubusercontent.com/socialcopsdev/camelot/master/docs/_static/camelot.png" width="200">
+   <img src="https://raw.githubusercontent.com/camelot-dev/camelot/master/docs/_static/camelot.png" width="200">
 </p>
 
 # Camelot: PDF Table Extraction for Humans
 
-[![Build Status](https://travis-ci.org/socialcopsdev/camelot.svg?branch=master)](https://travis-ci.org/socialcopsdev/camelot) [![Documentation Status](https://readthedocs.org/projects/camelot-py/badge/?version=master)](https://camelot-py.readthedocs.io/en/master/)
- [![codecov.io](https://codecov.io/github/socialcopsdev/camelot/badge.svg?branch=master&service=github)](https://codecov.io/github/socialcopsdev/camelot?branch=master)
+[![tests](https://github.com/camelot-dev/camelot/actions/workflows/tests.yml/badge.svg)](https://github.com/camelot-dev/camelot/actions/workflows/tests.yml) [![Documentation Status](https://readthedocs.org/projects/camelot-py/badge/?version=master)](https://camelot-py.readthedocs.io/en/master/)
+ [![codecov.io](https://codecov.io/github/camelot-dev/camelot/badge.svg?branch=master&service=github)](https://codecov.io/github/camelot-dev/camelot?branch=master)
  [![image](https://img.shields.io/pypi/v/camelot-py.svg)](https://pypi.org/project/camelot-py/) [![image](https://img.shields.io/pypi/l/camelot-py.svg)](https://pypi.org/project/camelot-py/) [![image](https://img.shields.io/pypi/pyversions/camelot-py.svg)](https://pypi.org/project/camelot-py/) [![Gitter chat](https://badges.gitter.im/camelot-dev/Lobby.png)](https://gitter.im/camelot-dev/Lobby)
+[![image](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/ambv/black)
 
-**Camelot** is a Python library that makes it easy for *anyone* to extract tables from PDF files!
+**Camelot** is a Python library that can help you extract tables from PDFs!
 
-**Note:** You can also check out [Excalibur](https://github.com/camelot-dev/excalibur), which is a web interface for Camelot!
+**Note:** You can also check out [Excalibur](https://github.com/camelot-dev/excalibur), the web interface to Camelot!
 
 ---
 
-**Here's how you can extract tables from PDF files.** Check out the PDF used in this example [here](https://github.com/socialcopsdev/camelot/blob/master/docs/_static/pdf/foo.pdf).
+**Here's how you can extract tables from PDFs.** You can check out the PDF used in this example [here](https://github.com/camelot-dev/camelot/blob/master/docs/_static/pdf/foo.pdf).
 
 <pre>
 >>> import camelot
 >>> tables = camelot.read_pdf('foo.pdf')
 >>> tables
 &lt;TableList n=1&gt;
->>> tables.export('foo.csv', f='csv', compress=True) # json, excel, html, sqlite
+>>> tables.export('foo.csv', f='csv', compress=True) # json, excel, html, markdown, sqlite
 >>> tables[0]
 &lt;Table shape=(7, 7)&gt;
 >>> tables[0].parsing_report
@@ -31,7 +32,7 @@
     'order': 1,
     'page': 1
 }
->>> tables[0].to_csv('foo.csv') # to_json, to_excel, to_html, to_sqlite
+>>> tables[0].to_csv('foo.csv') # to_json, to_excel, to_html, to_markdown, to_sqlite
 >>> tables[0].df # get a pandas DataFrame!
 </pre>
 
@@ -44,24 +45,29 @@
 | 2032_2     | 0.17      | 57.8          | 21.7%                | 0.3%            | 2.7%            | 1.2%           |
 | 4171_1     | 0.07      | 173.9         | 58.1%                | 1.6%            | 2.1%            | 0.5%           |
 
-There's a [command-line interface](https://camelot-py.readthedocs.io/en/master/user/cli.html) too!
+Camelot also comes packaged with a [command-line interface](https://camelot-py.readthedocs.io/en/master/user/cli.html)!
 
 **Note:** Camelot only works with text-based PDFs and not scanned documents. (As Tabula [explains](https://github.com/tabulapdf/tabula#why-tabula), "If you can click and drag to select text in your table in a PDF viewer, then your PDF is text-based".)
 
+You can check out some frequently asked questions [here](https://camelot-py.readthedocs.io/en/master/user/faq.html).
+
 ## Why Camelot?
 
-- **You are in control.**: Unlike other libraries and tools which either give a nice output or fail miserably (with no in-between), Camelot gives you the power to tweak table extraction. (This is important since everything in the real world, including PDF table extraction, is fuzzy.)
-- *Bad* tables can be discarded based on **metrics** like accuracy and whitespace, without ever having to manually look at each table.
-- Each table is a **pandas DataFrame**, which seamlessly integrates into [ETL and data analysis workflows](https://gist.github.com/vinayak-mehta/e5949f7c2410a0e12f25d3682dc9e873).
-- **Export** to multiple formats, including JSON, Excel, HTML and Sqlite.
+- **Configurability**: Camelot gives you control over the table extraction process with [tweakable settings](https://camelot-py.readthedocs.io/en/master/user/advanced.html).
+- **Metrics**: You can discard bad tables based on metrics like accuracy and whitespace, without having to manually look at each table.
+- **Output**: Each table is extracted into a **pandas DataFrame**, which seamlessly integrates into [ETL and data analysis workflows](https://gist.github.com/vinayak-mehta/e5949f7c2410a0e12f25d3682dc9e873). You can also export tables to multiple formats, which include CSV, JSON, Excel, HTML, Markdown, and Sqlite.
 
-See [comparison with other PDF table extraction libraries and tools](https://github.com/socialcopsdev/camelot/wiki/Comparison-with-other-PDF-Table-Extraction-libraries-and-tools).
+See [comparison with similar libraries and tools](https://github.com/camelot-dev/camelot/wiki/Comparison-with-other-PDF-Table-Extraction-libraries-and-tools).
+
+## Support the development
+
+If Camelot has helped you, please consider supporting its development with a one-time or monthly donation [on OpenCollective](https://opencollective.com/camelot).
 
 ## Installation
 
 ### Using conda
 
-The easiest way to install Camelot is to install it with [conda](https://conda.io/docs/), which is a package manager and  environment management system for the [Anaconda](http://docs.continuum.io/anaconda/) distribution.
+The easiest way to install Camelot is with [conda](https://conda.io/docs/), which is a package manager and environment management system for the [Anaconda](http://docs.continuum.io/anaconda/) distribution.
 
 <pre>
 $ conda install -c conda-forge camelot-py
@@ -69,10 +75,10 @@ $ conda install -c conda-forge camelot-py
 
 ### Using pip
 
-After [installing the dependencies](https://camelot-py.readthedocs.io/en/master/user/install-deps.html) ([tk](https://packages.ubuntu.com/trusty/python-tk) and [ghostscript](https://www.ghostscript.com/)), you can simply use pip to install Camelot:
+After [installing the dependencies](https://camelot-py.readthedocs.io/en/master/user/install-deps.html) ([tk](https://packages.ubuntu.com/bionic/python/python-tk) and [ghostscript](https://www.ghostscript.com/)), you can also just use pip to install Camelot:
 
 <pre>
-$ pip install camelot-py[cv]
+$ pip install "camelot-py[base]"
 </pre>
 
 ### From the source code
@@ -80,52 +86,32 @@ $ pip install camelot-py[cv]
 After [installing the dependencies](https://camelot-py.readthedocs.io/en/master/user/install.html#using-pip), clone the repo using:
 
 <pre>
-$ git clone https://www.github.com/socialcopsdev/camelot
+$ git clone https://www.github.com/camelot-dev/camelot
 </pre>
 
 and install Camelot using pip:
 
 <pre>
 $ cd camelot
-$ pip install ".[cv]"
+$ pip install ".[base]"
 </pre>
 
 ## Documentation
 
-Great documentation is available at [http://camelot-py.readthedocs.io/](http://camelot-py.readthedocs.io/).
+The documentation is available at [http://camelot-py.readthedocs.io/](http://camelot-py.readthedocs.io/).
 
-## Development
+## Wrappers
 
-The [Contributor's Guide](https://camelot-py.readthedocs.io/en/master/dev/contributing.html) has detailed information about contributing code, documentation, tests and more. We've included some basic information in this README.
+- [camelot-php](https://github.com/randomstate/camelot-php) provides a [PHP](https://www.php.net/) wrapper on Camelot.
 
-### Source code
+## Contributing
 
-You can check the latest sources with:
-
-<pre>
-$ git clone https://www.github.com/socialcopsdev/camelot
-</pre>
-
-### Setting up a development environment
-
-You can install the development dependencies easily, using pip:
-
-<pre>
-$ pip install camelot-py[dev]
-</pre>
-
-### Testing
-
-After installation, you can run tests using:
-
-<pre>
-$ python setup.py test
-</pre>
+The [Contributor's Guide](https://camelot-py.readthedocs.io/en/master/dev/contributing.html) has detailed information about contributing issues, documentation, code, and tests.
 
 ## Versioning
 
-Camelot uses [Semantic Versioning](https://semver.org/). For the available versions, see the tags on this repository. For the changelog, you can check out [HISTORY.md](https://github.com/socialcopsdev/camelot/blob/master/HISTORY.md).
+Camelot uses [Semantic Versioning](https://semver.org/). For the available versions, see the tags on this repository. For the changelog, you can check out [HISTORY.md](https://github.com/camelot-dev/camelot/blob/master/HISTORY.md).
 
 ## License
 
-This project is licensed under the MIT License, see the [LICENSE](https://github.com/socialcopsdev/camelot/blob/master/LICENSE) file for details.
+This project is licensed under the MIT License, see the [LICENSE](https://github.com/camelot-dev/camelot/blob/master/LICENSE) file for details.

camelot/__init__.py

@@ -2,26 +2,16 @@
 
 import logging
 
-from click import HelpFormatter
-
 from .__version__ import __version__
 from .io import read_pdf
 from .plotting import PlotMethods
 
 
-def _write_usage(self, prog, args='', prefix='Usage: '):
-    return self._write_usage('camelot', args, prefix=prefix)
-
-
-# monkey patch click.HelpFormatter
-HelpFormatter._write_usage = HelpFormatter.write_usage
-HelpFormatter.write_usage = _write_usage
-
 # set up logging
-logger = logging.getLogger('camelot')
+logger = logging.getLogger("camelot")
 
-format_string = '%(asctime)s - %(levelname)s - %(message)s'
-formatter = logging.Formatter(format_string, datefmt='%Y-%m-%dT%H:%M:%S')
+format_string = "%(asctime)s - %(levelname)s - %(message)s"
+formatter = logging.Formatter(format_string, datefmt="%Y-%m-%dT%H:%M:%S")
 handler = logging.StreamHandler()
 handler.setFormatter(formatter)
 

camelot/__main__.py

@@ -1,9 +1,7 @@
 # -*- coding: utf-8 -*-
 
-from __future__ import absolute_import
 
-
-__all__ = ('main',)
+__all__ = ("main",)
 
 
 def main():

camelot/__version__.py

@@ -1,23 +1,23 @@
 # -*- coding: utf-8 -*-
 
-VERSION = (0, 7, 0)
+VERSION = (0, 10, 1)
 PRERELEASE = None  # alpha, beta or rc
 REVISION = None
 
 
 def generate_version(version, prerelease=None, revision=None):
-    version_parts = ['.'.join(map(str, version))]
+    version_parts = [".".join(map(str, version))]
     if prerelease is not None:
-        version_parts.append('-{}'.format(prerelease))
+        version_parts.append(f"-{prerelease}")
     if revision is not None:
-        version_parts.append('.{}'.format(revision))
-    return ''.join(version_parts)
+        version_parts.append(f".{revision}")
+    return "".join(version_parts)
 
 
-__title__ = 'camelot-py'
-__description__ = 'PDF Table Extraction for Humans.'
-__url__ = 'http://camelot-py.readthedocs.io/'
+__title__ = "camelot-py"
+__description__ = "PDF Table Extraction for Humans."
+__url__ = "http://camelot-py.readthedocs.io/"
 __version__ = generate_version(VERSION, prerelease=PRERELEASE, revision=REVISION)
-__author__ = 'Vinayak Mehta'
-__author_email__ = 'vmehta94@gmail.com'
-__license__ = 'MIT License'
+__author__ = "Vinayak Mehta"
+__author_email__ = "vmehta94@gmail.com"
+__license__ = "MIT License"

camelot/backends/__init__.py

@@ -0,0 +1,3 @@
+# -*- coding: utf-8 -*-
+
+from .image_conversion import ImageConversionBackend

camelot/backends/ghostscript_backend.py

@@ -0,0 +1,47 @@
+# -*- coding: utf-8 -*-
+
+import sys
+import ctypes
+from ctypes.util import find_library
+
+
+def installed_posix():
+    library = find_library("gs")
+    return library is not None
+
+
+def installed_windows():
+    library = find_library(
+        "".join(("gsdll", str(ctypes.sizeof(ctypes.c_voidp) * 8), ".dll"))
+    )
+    return library is not None
+
+
+class GhostscriptBackend(object):
+    def installed(self):
+        if sys.platform in ["linux", "darwin"]:
+            return installed_posix()
+        elif sys.platform == "win32":
+            return installed_windows()
+        else:
+            return installed_posix()
+
+    def convert(self, pdf_path, png_path, resolution=300):
+        if not self.installed():
+            raise OSError(
+                "Ghostscript is not installed. You can install it using the instructions"
+                " here: https://camelot-py.readthedocs.io/en/master/user/install-deps.html"
+            )
+
+        import ghostscript
+
+        gs_command = [
+            "gs",
+            "-q",
+            "-sDEVICE=png16m",
+            "-o",
+            png_path,
+            f"-r{resolution}",
+            pdf_path,
+        ]
+        ghostscript.Ghostscript(*gs_command)

camelot/backends/image_conversion.py

@@ -0,0 +1,40 @@
+# -*- coding: utf-8 -*-
+
+from .poppler_backend import PopplerBackend
+from .ghostscript_backend import GhostscriptBackend
+
+BACKENDS = {"poppler": PopplerBackend, "ghostscript": GhostscriptBackend}
+
+
+class ImageConversionBackend(object):
+    def __init__(self, backend="poppler", use_fallback=True):
+        if backend not in BACKENDS.keys():
+            raise ValueError(f"Image conversion backend '{backend}' not supported")
+
+        self.backend = backend
+        self.use_fallback = use_fallback
+        self.fallbacks = list(filter(lambda x: x != backend, BACKENDS.keys()))
+
+    def convert(self, pdf_path, png_path):
+        try:
+            converter = BACKENDS[self.backend]()
+            converter.convert(pdf_path, png_path)
+        except Exception as e:
+            import sys
+
+            if self.use_fallback:
+                for fallback in self.fallbacks:
+                    try:
+                        converter = BACKENDS[fallback]()
+                        converter.convert(pdf_path, png_path)
+                    except Exception as e:
+                        raise type(e)(
+                            str(e) + f" with image conversion backend '{fallback}'"
+                        ).with_traceback(sys.exc_info()[2])
+                        continue
+                    else:
+                        break
+            else:
+                raise type(e)(
+                    str(e) + f" with image conversion backend '{self.backend}'"
+                ).with_traceback(sys.exc_info()[2])

camelot/backends/poppler_backend.py

@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+
+import shutil
+import subprocess
+
+
+class PopplerBackend(object):
+    def convert(self, pdf_path, png_path):
+        pdftopng_executable = shutil.which("pdftopng")
+        if pdftopng_executable is None:
+            raise OSError(
+                "pdftopng is not installed. You can install it using the 'pip install pdftopng' command."
+            )
+
+        pdftopng_command = [pdftopng_executable, pdf_path, png_path]
+
+        try:
+            subprocess.check_output(
+                " ".join(pdftopng_command), stderr=subprocess.STDOUT, shell=True
+            )
+        except subprocess.CalledProcessError as e:
+            raise ValueError(e.output)

camelot/cli.py

@@ -3,6 +3,7 @@
 import logging
 
 import click
+
 try:
     import matplotlib.pyplot as plt
 except ImportError:
@@ -13,7 +14,7 @@ else:
 from . import __version__, read_pdf, plot
 
 
-logger = logging.getLogger('camelot')
+logger = logging.getLogger("camelot")
 logger.setLevel(logging.INFO)
 
 
@@ -28,25 +29,49 @@ class Config(object):
 pass_config = click.make_pass_decorator(Config)
 
 
-@click.group()
+@click.group(name="camelot")
 @click.version_option(version=__version__)
-@click.option('-q', '--quiet', is_flag=False, help='Suppress logs and warnings.')
-@click.option('-p', '--pages', default='1', help='Comma-separated page numbers.'
-              ' Example: 1,3,4 or 1,4-end or all.')
-@click.option('-pw', '--password', help='Password for decryption.')
-@click.option('-o', '--output', help='Output file path.')
-@click.option('-f', '--format',
-              type=click.Choice(['csv', 'json', 'excel', 'html', 'sqlite']),
-              help='Output file format.')
-@click.option('-z', '--zip', is_flag=True, help='Create ZIP archive.')
-@click.option('-split', '--split_text', is_flag=True,
-              help='Split text that spans across multiple cells.')
-@click.option('-flag', '--flag_size', is_flag=True, help='Flag text based on'
-              ' font size. Useful to detect super/subscripts.')
-@click.option('-strip', '--strip_text', help='Characters that should be stripped from a string before'
-              ' assigning it to a cell.')
-@click.option('-M', '--margins', nargs=3, default=(1.0, 0.5, 0.1),
-              help='PDFMiner char_margin, line_margin and word_margin.')
+@click.option("-q", "--quiet", is_flag=False, help="Suppress logs and warnings.")
+@click.option(
+    "-p",
+    "--pages",
+    default="1",
+    help="Comma-separated page numbers." " Example: 1,3,4 or 1,4-end or all.",
+)
+@click.option("-pw", "--password", help="Password for decryption.")
+@click.option("-o", "--output", help="Output file path.")
+@click.option(
+    "-f",
+    "--format",
+    type=click.Choice(["csv", "excel", "html", "json", "markdown", "sqlite"]),
+    help="Output file format.",
+)
+@click.option("-z", "--zip", is_flag=True, help="Create ZIP archive.")
+@click.option(
+    "-split",
+    "--split_text",
+    is_flag=True,
+    help="Split text that spans across multiple cells.",
+)
+@click.option(
+    "-flag",
+    "--flag_size",
+    is_flag=True,
+    help="Flag text based on" " font size. Useful to detect super/subscripts.",
+)
+@click.option(
+    "-strip",
+    "--strip_text",
+    help="Characters that should be stripped from a string before"
+    " assigning it to a cell.",
+)
+@click.option(
+    "-M",
+    "--margins",
+    nargs=3,
+    default=(1.0, 0.5, 0.1),
+    help="PDFMiner char_margin, line_margin and word_margin.",
+)
 @click.pass_context
 def cli(ctx, *args, **kwargs):
     """Camelot: PDF Table Extraction for Humans"""
@@ -55,79 +80,131 @@ def cli(ctx, *args, **kwargs):
         ctx.obj.set_config(key, value)
 
 
-@cli.command('lattice')
-@click.option('-R', '--table_regions', default=[], multiple=True,
-              help='Page regions to analyze. Example: x1,y1,x2,y2'
-              ' where x1, y1 -> left-top and x2, y2 -> right-bottom.')
-@click.option('-T', '--table_areas', default=[], multiple=True,
-              help='Table areas to process. Example: x1,y1,x2,y2'
-              ' where x1, y1 -> left-top and x2, y2 -> right-bottom.')
-@click.option('-back', '--process_background', is_flag=True,
-              help='Process background lines.')
-@click.option('-scale', '--line_scale', default=15,
-              help='Line size scaling factor. The larger the value,'
-              ' the smaller the detected lines.')
-@click.option('-copy', '--copy_text', default=[], type=click.Choice(['h', 'v']),
-              multiple=True, help='Direction in which text in a spanning cell'
-              ' will be copied over.')
-@click.option('-shift', '--shift_text', default=['l', 't'],
-              type=click.Choice(['', 'l', 'r', 't', 'b']), multiple=True,
-              help='Direction in which text in a spanning cell will flow.')
-@click.option('-l', '--line_tol', default=2,
-              help='Tolerance parameter used to merge close vertical'
-              ' and horizontal lines.')
-@click.option('-j', '--joint_tol', default=2,
-              help='Tolerance parameter used to decide whether'
-              ' the detected lines and points lie close to each other.')
-@click.option('-block', '--threshold_blocksize', default=15,
-              help='For adaptive thresholding, size of a pixel'
-              ' neighborhood that is used to calculate a threshold value for'
-              ' the pixel. Example: 3, 5, 7, and so on.')
-@click.option('-const', '--threshold_constant', default=-2,
-              help='For adaptive thresholding, constant subtracted'
-              ' from the mean or weighted mean. Normally, it is positive but'
-              ' may be zero or negative as well.')
-@click.option('-I', '--iterations', default=0,
-              help='Number of times for erosion/dilation will be applied.')
-@click.option('-res', '--resolution', default=300,
-              help='Resolution used for PDF to PNG conversion.')
-@click.option('-plot', '--plot_type',
-              type=click.Choice(['text', 'grid', 'contour', 'joint', 'line']),
-              help='Plot elements found on PDF page for visual debugging.')
-@click.argument('filepath', type=click.Path(exists=True))
+@cli.command("lattice")
+@click.option(
+    "-R",
+    "--table_regions",
+    default=[],
+    multiple=True,
+    help="Page regions to analyze. Example: x1,y1,x2,y2"
+    " where x1, y1 -> left-top and x2, y2 -> right-bottom.",
+)
+@click.option(
+    "-T",
+    "--table_areas",
+    default=[],
+    multiple=True,
+    help="Table areas to process. Example: x1,y1,x2,y2"
+    " where x1, y1 -> left-top and x2, y2 -> right-bottom.",
+)
+@click.option(
+    "-back", "--process_background", is_flag=True, help="Process background lines."
+)
+@click.option(
+    "-scale",
+    "--line_scale",
+    default=15,
+    help="Line size scaling factor. The larger the value,"
+    " the smaller the detected lines.",
+)
+@click.option(
+    "-copy",
+    "--copy_text",
+    default=[],
+    type=click.Choice(["h", "v"]),
+    multiple=True,
+    help="Direction in which text in a spanning cell" " will be copied over.",
+)
+@click.option(
+    "-shift",
+    "--shift_text",
+    default=["l", "t"],
+    type=click.Choice(["", "l", "r", "t", "b"]),
+    multiple=True,
+    help="Direction in which text in a spanning cell will flow.",
+)
+@click.option(
+    "-l",
+    "--line_tol",
+    default=2,
+    help="Tolerance parameter used to merge close vertical" " and horizontal lines.",
+)
+@click.option(
+    "-j",
+    "--joint_tol",
+    default=2,
+    help="Tolerance parameter used to decide whether"
+    " the detected lines and points lie close to each other.",
+)
+@click.option(
+    "-block",
+    "--threshold_blocksize",
+    default=15,
+    help="For adaptive thresholding, size of a pixel"
+    " neighborhood that is used to calculate a threshold value for"
+    " the pixel. Example: 3, 5, 7, and so on.",
+)
+@click.option(
+    "-const",
+    "--threshold_constant",
+    default=-2,
+    help="For adaptive thresholding, constant subtracted"
+    " from the mean or weighted mean. Normally, it is positive but"
+    " may be zero or negative as well.",
+)
+@click.option(
+    "-I",
+    "--iterations",
+    default=0,
+    help="Number of times for erosion/dilation will be applied.",
+)
+@click.option(
+    "-res",
+    "--resolution",
+    default=300,
+    help="Resolution used for PDF to PNG conversion.",
+)
+@click.option(
+    "-plot",
+    "--plot_type",
+    type=click.Choice(["text", "grid", "contour", "joint", "line"]),
+    help="Plot elements found on PDF page for visual debugging.",
+)
+@click.argument("filepath", type=click.Path(exists=True))
 @pass_config
 def lattice(c, *args, **kwargs):
     """Use lines between text to parse the table."""
     conf = c.config
-    pages = conf.pop('pages')
-    output = conf.pop('output')
-    f = conf.pop('format')
-    compress = conf.pop('zip')
-    quiet = conf.pop('quiet')
-    plot_type = kwargs.pop('plot_type')
-    filepath = kwargs.pop('filepath')
+    pages = conf.pop("pages")
+    output = conf.pop("output")
+    f = conf.pop("format")
+    compress = conf.pop("zip")
+    quiet = conf.pop("quiet")
+    plot_type = kwargs.pop("plot_type")
+    filepath = kwargs.pop("filepath")
     kwargs.update(conf)
 
-    table_regions = list(kwargs['table_regions'])
-    kwargs['table_regions'] = None if not table_regions else table_regions
-    table_areas = list(kwargs['table_areas'])
-    kwargs['table_areas'] = None if not table_areas else table_areas
-    copy_text = list(kwargs['copy_text'])
-    kwargs['copy_text'] = None if not copy_text else copy_text
-    kwargs['shift_text'] = list(kwargs['shift_text'])
+    table_regions = list(kwargs["table_regions"])
+    kwargs["table_regions"] = None if not table_regions else table_regions
+    table_areas = list(kwargs["table_areas"])
+    kwargs["table_areas"] = None if not table_areas else table_areas
+    copy_text = list(kwargs["copy_text"])
+    kwargs["copy_text"] = None if not copy_text else copy_text
+    kwargs["shift_text"] = list(kwargs["shift_text"])
 
     if plot_type is not None:
         if not _HAS_MPL:
-            raise ImportError('matplotlib is required for plotting.')
+            raise ImportError("matplotlib is required for plotting.")
     else:
         if output is None:
-            raise click.UsageError('Please specify output file path using --output')
+            raise click.UsageError("Please specify output file path using --output")
         if f is None:
-            raise click.UsageError('Please specify output file format using --format')
+            raise click.UsageError("Please specify output file format using --format")
 
-    tables = read_pdf(filepath, pages=pages, flavor='lattice',
-                      suppress_stdout=quiet, **kwargs)
-    click.echo('Found {} tables'.format(tables.n))
+    tables = read_pdf(
+        filepath, pages=pages, flavor="lattice", suppress_stdout=quiet, **kwargs
+    )
+    click.echo(f"Found {tables.n} tables")
     if plot_type is not None:
         for table in tables:
             plot(table, kind=plot_type)
@@ -136,57 +213,89 @@ def lattice(c, *args, **kwargs):
         tables.export(output, f=f, compress=compress)
 
 
-@cli.command('stream')
-@click.option('-R', '--table_regions', default=[], multiple=True,
-              help='Page regions to analyze. Example: x1,y1,x2,y2'
-              ' where x1, y1 -> left-top and x2, y2 -> right-bottom.')
-@click.option('-T', '--table_areas', default=[], multiple=True,
-              help='Table areas to process. Example: x1,y1,x2,y2'
-              ' where x1, y1 -> left-top and x2, y2 -> right-bottom.')
-@click.option('-C', '--columns', default=[], multiple=True,
-              help='X coordinates of column separators.')
-@click.option('-e', '--edge_tol', default=50, help='Tolerance parameter'
-              ' for extending textedges vertically.')
-@click.option('-r', '--row_tol', default=2, help='Tolerance parameter'
-              ' used to combine text vertically, to generate rows.')
-@click.option('-c', '--column_tol', default=0, help='Tolerance parameter'
-              ' used to combine text horizontally, to generate columns.')
-@click.option('-plot', '--plot_type',
-              type=click.Choice(['text', 'grid', 'contour', 'textedge']),
-              help='Plot elements found on PDF page for visual debugging.')
-@click.argument('filepath', type=click.Path(exists=True))
+@cli.command("stream")
+@click.option(
+    "-R",
+    "--table_regions",
+    default=[],
+    multiple=True,
+    help="Page regions to analyze. Example: x1,y1,x2,y2"
+    " where x1, y1 -> left-top and x2, y2 -> right-bottom.",
+)
+@click.option(
+    "-T",
+    "--table_areas",
+    default=[],
+    multiple=True,
+    help="Table areas to process. Example: x1,y1,x2,y2"
+    " where x1, y1 -> left-top and x2, y2 -> right-bottom.",
+)
+@click.option(
+    "-C",
+    "--columns",
+    default=[],
+    multiple=True,
+    help="X coordinates of column separators.",
+)
+@click.option(
+    "-e",
+    "--edge_tol",
+    default=50,
+    help="Tolerance parameter" " for extending textedges vertically.",
+)
+@click.option(
+    "-r",
+    "--row_tol",
+    default=2,
+    help="Tolerance parameter" " used to combine text vertically, to generate rows.",
+)
+@click.option(
+    "-c",
+    "--column_tol",
+    default=0,
+    help="Tolerance parameter"
+    " used to combine text horizontally, to generate columns.",
+)
+@click.option(
+    "-plot",
+    "--plot_type",
+    type=click.Choice(["text", "grid", "contour", "textedge"]),
+    help="Plot elements found on PDF page for visual debugging.",
+)
+@click.argument("filepath", type=click.Path(exists=True))
 @pass_config
 def stream(c, *args, **kwargs):
     """Use spaces between text to parse the table."""
     conf = c.config
-    pages = conf.pop('pages')
-    output = conf.pop('output')
-    f = conf.pop('format')
-    compress = conf.pop('zip')
-    quiet = conf.pop('quiet')
-    plot_type = kwargs.pop('plot_type')
-    filepath = kwargs.pop('filepath')
+    pages = conf.pop("pages")
+    output = conf.pop("output")
+    f = conf.pop("format")
+    compress = conf.pop("zip")
+    quiet = conf.pop("quiet")
+    plot_type = kwargs.pop("plot_type")
+    filepath = kwargs.pop("filepath")
     kwargs.update(conf)
 
-    table_regions = list(kwargs['table_regions'])
-    kwargs['table_regions'] = None if not table_regions else table_regions
-    table_areas = list(kwargs['table_areas'])
-    kwargs['table_areas'] = None if not table_areas else table_areas
-    columns = list(kwargs['columns'])
-    kwargs['columns'] = None if not columns else columns
+    table_regions = list(kwargs["table_regions"])
+    kwargs["table_regions"] = None if not table_regions else table_regions
+    table_areas = list(kwargs["table_areas"])
+    kwargs["table_areas"] = None if not table_areas else table_areas
+    columns = list(kwargs["columns"])
+    kwargs["columns"] = None if not columns else columns
 
     if plot_type is not None:
         if not _HAS_MPL:
-            raise ImportError('matplotlib is required for plotting.')
+            raise ImportError("matplotlib is required for plotting.")
     else:
         if output is None:
-            raise click.UsageError('Please specify output file path using --output')
+            raise click.UsageError("Please specify output file path using --output")
         if f is None:
-            raise click.UsageError('Please specify output file format using --format')
+            raise click.UsageError("Please specify output file format using --format")
 
-    tables = read_pdf(filepath, pages=pages, flavor='stream',
-                      suppress_stdout=quiet, **kwargs)
-    click.echo('Found {} tables'.format(tables.n))
+    tables = read_pdf(
+        filepath, pages=pages, flavor="stream", suppress_stdout=quiet, **kwargs
+    )
+    click.echo(f"Found {tables.n} tables")
     if plot_type is not None:
         for table in tables:
             plot(table, kind=plot_type)

camelot/core.py

@@ -42,7 +42,8 @@ class TextEdge(object):
         TEXTEDGE_REQUIRED_ELEMENTS horizontal text rows.
 
     """
-    def __init__(self, x, y0, y1, align='left'):
+
+    def __init__(self, x, y0, y1, align="left"):
         self.x = x
         self.y0 = y0
         self.y1 = y1
@@ -51,8 +52,12 @@ class TextEdge(object):
         self.is_valid = False
 
     def __repr__(self):
-        return '<TextEdge x={} y0={} y1={} align={} valid={}>'.format(
-            round(self.x, 2), round(self.y0, 2), round(self.y1, 2), self.align, self.is_valid)
+        x = round(self.x, 2)
+        y0 = round(self.y0, 2)
+        y1 = round(self.y1, 2)
+        return (
+            f"<TextEdge x={x} y0={y0} y1={y1} align={self.align} valid={self.is_valid}>"
+        )
 
     def update_coords(self, x, y0, edge_tol=50):
         """Updates the text edge's x and bottom y coordinates and sets
@@ -73,9 +78,10 @@ class TextEdges(object):
     the PDF page. The dict has three keys based on the alignments,
     and each key's value is a list of camelot.core.TextEdge objects.
     """
+
     def __init__(self, edge_tol=50):
         self.edge_tol = edge_tol
-        self._textedges = {'left': [], 'right': [], 'middle': []}
+        self._textedges = {"left": [], "right": [], "middle": []}
 
     @staticmethod
     def get_x_coord(textline, align):
@@ -85,7 +91,7 @@ class TextEdges(object):
         x_left = textline.x0
         x_right = textline.x1
         x_middle = x_left + (x_right - x_left) / 2.0
-        x_coord = {'left': x_left, 'middle': x_middle, 'right': x_right}
+        x_coord = {"left": x_left, "middle": x_middle, "right": x_right}
         return x_coord[align]
 
     def find(self, x_coord, align):
@@ -98,8 +104,7 @@ class TextEdges(object):
         return None
 
     def add(self, textline, align):
-        """Adds a new text edge to the current dict.
-        """
+        """Adds a new text edge to the current dict."""
         x = self.get_x_coord(textline, align)
         y0 = textline.y0
         y1 = textline.y1
@@ -107,16 +112,16 @@ class TextEdges(object):
         self._textedges[align].append(te)
 
     def update(self, textline):
-        """Updates an existing text edge in the current dict.
-        """
-        for align in ['left', 'right', 'middle']:
+        """Updates an existing text edge in the current dict."""
+        for align in ["left", "right", "middle"]:
             x_coord = self.get_x_coord(textline, align)
             idx = self.find(x_coord, align)
             if idx is None:
                 self.add(textline, align)
             else:
                 self._textedges[align][idx].update_coords(
-                    x_coord, textline.y0, edge_tol=self.edge_tol)
+                    x_coord, textline.y0, edge_tol=self.edge_tol
+                )
 
     def generate(self, textlines):
         """Generates the text edges dict based on horizontal text
@@ -132,9 +137,15 @@ class TextEdges(object):
         the most.
         """
         intersections_sum = {
-            'left': sum(te.intersections for te in self._textedges['left'] if te.is_valid),
-            'right': sum(te.intersections for te in self._textedges['right'] if te.is_valid),
-            'middle': sum(te.intersections for te in self._textedges['middle'] if te.is_valid)
+            "left": sum(
+                te.intersections for te in self._textedges["left"] if te.is_valid
+            ),
+            "right": sum(
+                te.intersections for te in self._textedges["right"] if te.is_valid
+            ),
+            "middle": sum(
+                te.intersections for te in self._textedges["middle"] if te.is_valid
+            ),
         }
 
         # TODO: naive
@@ -147,6 +158,7 @@ class TextEdges(object):
         """Returns a dict of interesting table areas on the PDF page
         calculated using relevant text edges.
         """
+
         def pad(area, average_row_height):
             x0 = area[0] - TABLE_AREA_PADDING
             y0 = area[1] - TABLE_AREA_PADDING
@@ -175,7 +187,11 @@ class TextEdges(object):
                     else:
                         table_areas.pop(found)
                         updated_area = (
-                            found[0], min(te.y0, found[1]), max(found[2], te.x), max(found[3], te.y1))
+                            found[0],
+                            min(te.y0, found[1]),
+                            max(found[2], te.x),
+                            max(found[3], te.y1),
+                        )
                         table_areas[updated_area] = None
 
         # extend table areas based on textlines that overlap
@@ -196,7 +212,11 @@ class TextEdges(object):
             if found is not None:
                 table_areas.pop(found)
                 updated_area = (
-                    min(tl.x0, found[0]), min(tl.y0, found[1]), max(found[2], tl.x1), max(found[3], tl.y1))
+                    min(tl.x0, found[0]),
+                    min(tl.y0, found[1]),
+                    max(found[2], tl.x1),
+                    max(found[3], tl.y1),
+                )
                 table_areas[updated_area] = None
         average_textline_height = sum_textline_height / float(len(textlines))
 
@@ -265,11 +285,14 @@ class Cell(object):
         self.bottom = False
         self.hspan = False
         self.vspan = False
-        self._text = ''
+        self._text = ""
 
     def __repr__(self):
-        return '<Cell x1={} y1={} x2={} y2={}>'.format(
-            round(self.x1, 2), round(self.y1, 2), round(self.x2, 2), round(self.y2, 2))
+        x1 = round(self.x1)
+        y1 = round(self.y1)
+        x2 = round(self.x2)
+        y2 = round(self.y2)
+        return f"<Cell x1={x1} y1={y1} x2={x2} y2={y2}>"
 
     @property
     def text(self):
@@ -277,12 +300,11 @@ class Cell(object):
 
     @text.setter
     def text(self, t):
-        self._text = ''.join([self._text, t])
+        self._text = "".join([self._text, t])
 
     @property
     def bound(self):
-        """The number of sides on which the cell is bounded.
-        """
+        """The number of sides on which the cell is bounded."""
         return self.top + self.bottom + self.left + self.right
 
 
@@ -314,11 +336,11 @@ class Table(object):
         PDF page number.
 
     """
+
     def __init__(self, cols, rows):
         self.cols = cols
         self.rows = rows
-        self.cells = [[Cell(c[0], r[1], c[1], r[0])
-                       for c in cols] for r in rows]
+        self.cells = [[Cell(c[0], r[1], c[1], r[0]) for c in cols] for r in rows]
         self.df = None
         self.shape = (0, 0)
         self.accuracy = 0
@@ -327,12 +349,18 @@ class Table(object):
         self.page = None
 
     def __repr__(self):
-        return '<{} shape={}>'.format(self.__class__.__name__, self.shape)
+        return f"<{self.__class__.__name__} shape={self.shape}>"
+
+    def __lt__(self, other):
+        if self.page == other.page:
+            if self.order < other.order:
+                return True
+        if self.page < other.page:
+            return True
 
     @property
     def data(self):
-        """Returns two-dimensional list of strings in table.
-        """
+        """Returns two-dimensional list of strings in table."""
         d = []
         for row in self.cells:
             d.append([cell.text.strip() for cell in row])
@@ -345,16 +373,15 @@ class Table(object):
         """
         # pretty?
         report = {
-            'accuracy': round(self.accuracy, 2),
-            'whitespace': round(self.whitespace, 2),
-            'order': self.order,
-            'page': self.page
+            "accuracy": round(self.accuracy, 2),
+            "whitespace": round(self.whitespace, 2),
+            "order": self.order,
+            "page": self.page,
         }
         return report
 
     def set_all_edges(self):
-        """Sets all table edges to True.
-        """
+        """Sets all table edges to True."""
         for row in self.cells:
             for cell in row:
                 cell.left = cell.right = cell.top = cell.bottom = True
@@ -376,12 +403,21 @@ class Table(object):
         for v in vertical:
             # find closest x coord
             # iterate over y coords and find closest start and end points
-            i = [i for i, t in enumerate(self.cols)
-                 if np.isclose(v[0], t[0], atol=joint_tol)]
-            j = [j for j, t in enumerate(self.rows)
-                 if np.isclose(v[3], t[0], atol=joint_tol)]
-            k = [k for k, t in enumerate(self.rows)
-                 if np.isclose(v[1], t[0], atol=joint_tol)]
+            i = [
+                i
+                for i, t in enumerate(self.cols)
+                if np.isclose(v[0], t[0], atol=joint_tol)
+            ]
+            j = [
+                j
+                for j, t in enumerate(self.rows)
+                if np.isclose(v[3], t[0], atol=joint_tol)
+            ]
+            k = [
+                k
+                for k, t in enumerate(self.rows)
+                if np.isclose(v[1], t[0], atol=joint_tol)
+            ]
             if not j:
                 continue
             J = j[0]
@@ -427,12 +463,21 @@ class Table(object):
         for h in horizontal:
             # find closest y coord
             # iterate over x coords and find closest start and end points
-            i = [i for i, t in enumerate(self.rows)
-                 if np.isclose(h[1], t[0], atol=joint_tol)]
-            j = [j for j, t in enumerate(self.cols)
-                 if np.isclose(h[0], t[0], atol=joint_tol)]
-            k = [k for k, t in enumerate(self.cols)
-                 if np.isclose(h[2], t[0], atol=joint_tol)]
+            i = [
+                i
+                for i, t in enumerate(self.rows)
+                if np.isclose(h[1], t[0], atol=joint_tol)
+            ]
+            j = [
+                j
+                for j, t in enumerate(self.cols)
+                if np.isclose(h[0], t[0], atol=joint_tol)
+            ]
+            k = [
+                k
+                for k, t in enumerate(self.cols)
+                if np.isclose(h[2], t[0], atol=joint_tol)
+            ]
             if not j:
                 continue
             J = j[0]
@@ -478,8 +523,7 @@ class Table(object):
         return self
 
     def set_border(self):
-        """Sets table border edges to True.
-        """
+        """Sets table border edges to True."""
         for r in range(len(self.rows)):
             self.cells[r][0].left = True
             self.cells[r][len(self.cols) - 1].right = True
@@ -530,12 +574,7 @@ class Table(object):
             Output filepath.
 
         """
-        kw = {
-            'encoding': 'utf-8',
-            'index': False,
-            'header': False,
-            'quoting': 1
-        }
+        kw = {"encoding": "utf-8", "index": False, "header": False, "quoting": 1}
         kw.update(kwargs)
         self.df.to_csv(path, **kw)
 
@@ -550,12 +589,10 @@ class Table(object):
             Output filepath.
 
         """
-        kw = {
-            'orient': 'records'
-        }
+        kw = {"orient": "records"}
         kw.update(kwargs)
         json_string = self.df.to_json(**kw)
-        with open(path, 'w') as f:
+        with open(path, "w") as f:
             f.write(json_string)
 
     def to_excel(self, path, **kwargs):
@@ -570,8 +607,8 @@ class Table(object):
 
         """
         kw = {
-            'sheet_name': 'page-{}-table-{}'.format(self.page, self.order),
-            'encoding': 'utf-8'
+            "sheet_name": f"page-{self.page}-table-{self.order}",
+            "encoding": "utf-8",
         }
         kw.update(kwargs)
         writer = pd.ExcelWriter(path)
@@ -590,9 +627,24 @@ class Table(object):
 
         """
         html_string = self.df.to_html(**kwargs)
-        with open(path, 'w') as f:
+        with open(path, "w", encoding="utf-8") as f:
             f.write(html_string)
 
+    def to_markdown(self, path, **kwargs):
+        """Writes Table to a Markdown file.
+
+        For kwargs, check :meth:`pandas.DataFrame.to_markdown`.
+
+        Parameters
+        ----------
+        path : str
+            Output filepath.
+
+        """
+        md_string = self.df.to_markdown(**kwargs)
+        with open(path, "w", encoding="utf-8") as f:
+            f.write(md_string)
+
     def to_sqlite(self, path, **kwargs):
         """Writes Table to sqlite database.
 
@@ -604,13 +656,10 @@ class Table(object):
             Output filepath.
 
         """
-        kw = {
-            'if_exists': 'replace',
-            'index': False
-        }
+        kw = {"if_exists": "replace", "index": False}
         kw.update(kwargs)
         conn = sqlite3.connect(path)
-        table_name = 'page-{}-table-{}'.format(self.page, self.order)
+        table_name = f"page-{self.page}-table-{self.order}"
         self.df.to_sql(table_name, conn, **kw)
         conn.commit()
         conn.close()
@@ -626,12 +675,12 @@ class TableList(object):
         Number of tables in the list.
 
     """
+
     def __init__(self, tables):
         self._tables = tables
 
     def __repr__(self):
-        return '<{} n={}>'.format(
-            self.__class__.__name__, self.n)
+        return f"<{self.__class__.__name__} n={self.n}>"
 
     def __len__(self):
         return len(self._tables)
@@ -641,37 +690,35 @@ class TableList(object):
 
     @staticmethod
     def _format_func(table, f):
-        return getattr(table, 'to_{}'.format(f))
+        return getattr(table, f"to_{f}")
 
     @property
     def n(self):
         return len(self)
 
     def _write_file(self, f=None, **kwargs):
-        dirname = kwargs.get('dirname')
-        root = kwargs.get('root')
-        ext = kwargs.get('ext')
+        dirname = kwargs.get("dirname")
+        root = kwargs.get("root")
+        ext = kwargs.get("ext")
         for table in self._tables:
-            filename = os.path.join('{}-page-{}-table-{}{}'.format(
-                                    root, table.page, table.order, ext))
+            filename = f"{root}-page-{table.page}-table-{table.order}{ext}"
             filepath = os.path.join(dirname, filename)
             to_format = self._format_func(table, f)
             to_format(filepath)
 
     def _compress_dir(self, **kwargs):
-        path = kwargs.get('path')
-        dirname = kwargs.get('dirname')
-        root = kwargs.get('root')
-        ext = kwargs.get('ext')
-        zipname = os.path.join(os.path.dirname(path), root) + '.zip'
-        with zipfile.ZipFile(zipname, 'w', allowZip64=True) as z:
+        path = kwargs.get("path")
+        dirname = kwargs.get("dirname")
+        root = kwargs.get("root")
+        ext = kwargs.get("ext")
+        zipname = os.path.join(os.path.dirname(path), root) + ".zip"
+        with zipfile.ZipFile(zipname, "w", allowZip64=True) as z:
             for table in self._tables:
-                filename = os.path.join('{}-page-{}-table-{}{}'.format(
-                                        root, table.page, table.order, ext))
+                filename = f"{root}-page-{table.page}-table-{table.order}{ext}"
                 filepath = os.path.join(dirname, filename)
                 z.write(filepath, os.path.basename(filepath))
 
-    def export(self, path, f='csv', compress=False):
+    def export(self, path, f="csv", compress=False):
         """Exports the list of tables to specified file format.
 
         Parameters
@@ -679,7 +726,7 @@ class TableList(object):
         path : str
             Output filepath.
         f : str
-            File format. Can be csv, json, excel, html and sqlite.
+            File format. Can be csv, excel, html, json, markdown or sqlite.
         compress : bool
             Whether or not to add files to a ZIP archive.
 
@@ -690,33 +737,28 @@ class TableList(object):
         if compress:
             dirname = tempfile.mkdtemp()
 
-        kwargs = {
-            'path': path,
-            'dirname': dirname,
-            'root': root,
-            'ext': ext
-        }
+        kwargs = {"path": path, "dirname": dirname, "root": root, "ext": ext}
 
-        if f in ['csv', 'json', 'html']:
+        if f in ["csv", "html", "json", "markdown"]:
             self._write_file(f=f, **kwargs)
             if compress:
                 self._compress_dir(**kwargs)
-        elif f == 'excel':
+        elif f == "excel":
             filepath = os.path.join(dirname, basename)
             writer = pd.ExcelWriter(filepath)
             for table in self._tables:
-                sheet_name = 'page-{}-table-{}'.format(table.page, table.order)
-                table.df.to_excel(writer, sheet_name=sheet_name, encoding='utf-8')
+                sheet_name = f"page-{table.page}-table-{table.order}"
+                table.df.to_excel(writer, sheet_name=sheet_name, encoding="utf-8")
             writer.save()
             if compress:
-                zipname = os.path.join(os.path.dirname(path), root) + '.zip'
-                with zipfile.ZipFile(zipname, 'w', allowZip64=True) as z:
+                zipname = os.path.join(os.path.dirname(path), root) + ".zip"
+                with zipfile.ZipFile(zipname, "w", allowZip64=True) as z:
                     z.write(filepath, os.path.basename(filepath))
-        elif f == 'sqlite':
+        elif f == "sqlite":
             filepath = os.path.join(dirname, basename)
             for table in self._tables:
                 table.to_sqlite(filepath)
             if compress:
-                zipname = os.path.join(os.path.dirname(path), root) + '.zip'
-                with zipfile.ZipFile(zipname, 'w', allowZip64=True) as z:
+                zipname = os.path.join(os.path.dirname(path), root) + ".zip"
+                with zipfile.ZipFile(zipname, "w", allowZip64=True) as z:
                     z.write(filepath, os.path.basename(filepath))

camelot/ext/ghostscript/COPYING

@@ -1,674 +0,0 @@
-                    GNU GENERAL PUBLIC LICENSE
-                       Version 3, 29 June 2007
-
- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
-                            Preamble
-
-  The GNU General Public License is a free, copyleft license for
-software and other kinds of works.
-
-  The licenses for most software and other practical works are designed
-to take away your freedom to share and change the works.  By contrast,
-the GNU General Public License is intended to guarantee your freedom to
-share and change all versions of a program--to make sure it remains free
-software for all its users.  We, the Free Software Foundation, use the
-GNU General Public License for most of our software; it applies also to
-any other work released this way by its authors.  You can apply it to
-your programs, too.
-
-  When we speak of free software, we are referring to freedom, not
-price.  Our General Public Licenses are designed to make sure that you
-have the freedom to distribute copies of free software (and charge for
-them if you wish), that you receive source code or can get it if you
-want it, that you can change the software or use pieces of it in new
-free programs, and that you know you can do these things.
-
-  To protect your rights, we need to prevent others from denying you
-these rights or asking you to surrender the rights.  Therefore, you have
-certain responsibilities if you distribute copies of the software, or if
-you modify it: responsibilities to respect the freedom of others.
-
-  For example, if you distribute copies of such a program, whether
-gratis or for a fee, you must pass on to the recipients the same
-freedoms that you received.  You must make sure that they, too, receive
-or can get the source code.  And you must show them these terms so they
-know their rights.
-
-  Developers that use the GNU GPL protect your rights with two steps:
-(1) assert copyright on the software, and (2) offer you this License
-giving you legal permission to copy, distribute and/or modify it.
-
-  For the developers' and authors' protection, the GPL clearly explains
-that there is no warranty for this free software.  For both users' and
-authors' sake, the GPL requires that modified versions be marked as
-changed, so that their problems will not be attributed erroneously to
-authors of previous versions.
-
-  Some devices are designed to deny users access to install or run
-modified versions of the software inside them, although the manufacturer
-can do so.  This is fundamentally incompatible with the aim of
-protecting users' freedom to change the software.  The systematic
-pattern of such abuse occurs in the area of products for individuals to
-use, which is precisely where it is most unacceptable.  Therefore, we
-have designed this version of the GPL to prohibit the practice for those
-products.  If such problems arise substantially in other domains, we
-stand ready to extend this provision to those domains in future versions
-of the GPL, as needed to protect the freedom of users.
-
-  Finally, every program is threatened constantly by software patents.
-States should not allow patents to restrict development and use of
-software on general-purpose computers, but in those that do, we wish to
-avoid the special danger that patents applied to a free program could
-make it effectively proprietary.  To prevent this, the GPL assures that
-patents cannot be used to render the program non-free.
-
-  The precise terms and conditions for copying, distribution and
-modification follow.
-
-                       TERMS AND CONDITIONS
-
-  0. Definitions.
-
-  "This License" refers to version 3 of the GNU General Public License.
-
-  "Copyright" also means copyright-like laws that apply to other kinds of
-works, such as semiconductor masks.
-
-  "The Program" refers to any copyrightable work licensed under this
-License.  Each licensee is addressed as "you".  "Licensees" and
-"recipients" may be individuals or organizations.
-
-  To "modify" a work means to copy from or adapt all or part of the work
-in a fashion requiring copyright permission, other than the making of an
-exact copy.  The resulting work is called a "modified version" of the
-earlier work or a work "based on" the earlier work.
-
-  A "covered work" means either the unmodified Program or a work based
-on the Program.
-
-  To "propagate" a work means to do anything with it that, without
-permission, would make you directly or secondarily liable for
-infringement under applicable copyright law, except executing it on a
-computer or modifying a private copy.  Propagation includes copying,
-distribution (with or without modification), making available to the
-public, and in some countries other activities as well.
-
-  To "convey" a work means any kind of propagation that enables other
-parties to make or receive copies.  Mere interaction with a user through
-a computer network, with no transfer of a copy, is not conveying.
-
-  An interactive user interface displays "Appropriate Legal Notices"
-to the extent that it includes a convenient and prominently visible
-feature that (1) displays an appropriate copyright notice, and (2)
-tells the user that there is no warranty for the work (except to the
-extent that warranties are provided), that licensees may convey the
-work under this License, and how to view a copy of this License.  If
-the interface presents a list of user commands or options, such as a
-menu, a prominent item in the list meets this criterion.
-
-  1. Source Code.
-
-  The "source code" for a work means the preferred form of the work
-for making modifications to it.  "Object code" means any non-source
-form of a work.
-
-  A "Standard Interface" means an interface that either is an official
-standard defined by a recognized standards body, or, in the case of
-interfaces specified for a particular programming language, one that
-is widely used among developers working in that language.
-
-  The "System Libraries" of an executable work include anything, other
-than the work as a whole, that (a) is included in the normal form of
-packaging a Major Component, but which is not part of that Major
-Component, and (b) serves only to enable use of the work with that
-Major Component, or to implement a Standard Interface for which an
-implementation is available to the public in source code form.  A
-"Major Component", in this context, means a major essential component
-(kernel, window system, and so on) of the specific operating system
-(if any) on which the executable work runs, or a compiler used to
-produce the work, or an object code interpreter used to run it.
-
-  The "Corresponding Source" for a work in object code form means all
-the source code needed to generate, install, and (for an executable
-work) run the object code and to modify the work, including scripts to
-control those activities.  However, it does not include the work's
-System Libraries, or general-purpose tools or generally available free
-programs which are used unmodified in performing those activities but
-which are not part of the work.  For example, Corresponding Source
-includes interface definition files associated with source files for
-the work, and the source code for shared libraries and dynamically
-linked subprograms that the work is specifically designed to require,
-such as by intimate data communication or control flow between those
-subprograms and other parts of the work.
-
-  The Corresponding Source need not include anything that users
-can regenerate automatically from other parts of the Corresponding
-Source.
-
-  The Corresponding Source for a work in source code form is that
-same work.
-
-  2. Basic Permissions.
-
-  All rights granted under this License are granted for the term of
-copyright on the Program, and are irrevocable provided the stated
-conditions are met.  This License explicitly affirms your unlimited
-permission to run the unmodified Program.  The output from running a
-covered work is covered by this License only if the output, given its
-content, constitutes a covered work.  This License acknowledges your
-rights of fair use or other equivalent, as provided by copyright law.
-
-  You may make, run and propagate covered works that you do not
-convey, without conditions so long as your license otherwise remains
-in force.  You may convey covered works to others for the sole purpose
-of having them make modifications exclusively for you, or provide you
-with facilities for running those works, provided that you comply with
-the terms of this License in conveying all material for which you do
-not control copyright.  Those thus making or running the covered works
-for you must do so exclusively on your behalf, under your direction
-and control, on terms that prohibit them from making any copies of
-your copyrighted material outside their relationship with you.
-
-  Conveying under any other circumstances is permitted solely under
-the conditions stated below.  Sublicensing is not allowed; section 10
-makes it unnecessary.
-
-  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
-
-  No covered work shall be deemed part of an effective technological
-measure under any applicable law fulfilling obligations under article
-11 of the WIPO copyright treaty adopted on 20 December 1996, or
-similar laws prohibiting or restricting circumvention of such
-measures.
-
-  When you convey a covered work, you waive any legal power to forbid
-circumvention of technological measures to the extent such circumvention
-is effected by exercising rights under this License with respect to
-the covered work, and you disclaim any intention to limit operation or
-modification of the work as a means of enforcing, against the work's
-users, your or third parties' legal rights to forbid circumvention of
-technological measures.
-
-  4. Conveying Verbatim Copies.
-
-  You may convey verbatim copies of the Program's source code as you
-receive it, in any medium, provided that you conspicuously and
-appropriately publish on each copy an appropriate copyright notice;
-keep intact all notices stating that this License and any
-non-permissive terms added in accord with section 7 apply to the code;
-keep intact all notices of the absence of any warranty; and give all
-recipients a copy of this License along with the Program.
-
-  You may charge any price or no price for each copy that you convey,
-and you may offer support or warranty protection for a fee.
-
-  5. Conveying Modified Source Versions.
-
-  You may convey a work based on the Program, or the modifications to
-produce it from the Program, in the form of source code under the
-terms of section 4, provided that you also meet all of these conditions:
-
-    a) The work must carry prominent notices stating that you modified
-    it, and giving a relevant date.
-
-    b) The work must carry prominent notices stating that it is
-    released under this License and any conditions added under section
-    7.  This requirement modifies the requirement in section 4 to
-    "keep intact all notices".
-
-    c) You must license the entire work, as a whole, under this
-    License to anyone who comes into possession of a copy.  This
-    License will therefore apply, along with any applicable section 7
-    additional terms, to the whole of the work, and all its parts,
-    regardless of how they are packaged.  This License gives no
-    permission to license the work in any other way, but it does not
-    invalidate such permission if you have separately received it.
-
-    d) If the work has interactive user interfaces, each must display
-    Appropriate Legal Notices; however, if the Program has interactive
-    interfaces that do not display Appropriate Legal Notices, your
-    work need not make them do so.
-
-  A compilation of a covered work with other separate and independent
-works, which are not by their nature extensions of the covered work,
-and which are not combined with it such as to form a larger program,
-in or on a volume of a storage or distribution medium, is called an
-"aggregate" if the compilation and its resulting copyright are not
-used to limit the access or legal rights of the compilation's users
-beyond what the individual works permit.  Inclusion of a covered work
-in an aggregate does not cause this License to apply to the other
-parts of the aggregate.
-
-  6. Conveying Non-Source Forms.
-
-  You may convey a covered work in object code form under the terms
-of sections 4 and 5, provided that you also convey the
-machine-readable Corresponding Source under the terms of this License,
-in one of these ways:
-
-    a) Convey the object code in, or embodied in, a physical product
-    (including a physical distribution medium), accompanied by the
-    Corresponding Source fixed on a durable physical medium
-    customarily used for software interchange.
-
-    b) Convey the object code in, or embodied in, a physical product
-    (including a physical distribution medium), accompanied by a
-    written offer, valid for at least three years and valid for as
-    long as you offer spare parts or customer support for that product
-    model, to give anyone who possesses the object code either (1) a
-    copy of the Corresponding Source for all the software in the
-    product that is covered by this License, on a durable physical
-    medium customarily used for software interchange, for a price no
-    more than your reasonable cost of physically performing this
-    conveying of source, or (2) access to copy the
-    Corresponding Source from a network server at no charge.
-
-    c) Convey individual copies of the object code with a copy of the
-    written offer to provide the Corresponding Source.  This
-    alternative is allowed only occasionally and noncommercially, and
-    only if you received the object code with such an offer, in accord
-    with subsection 6b.
-
-    d) Convey the object code by offering access from a designated
-    place (gratis or for a charge), and offer equivalent access to the
-    Corresponding Source in the same way through the same place at no
-    further charge.  You need not require recipients to copy the
-    Corresponding Source along with the object code.  If the place to
-    copy the object code is a network server, the Corresponding Source
-    may be on a different server (operated by you or a third party)
-    that supports equivalent copying facilities, provided you maintain
-    clear directions next to the object code saying where to find the
-    Corresponding Source.  Regardless of what server hosts the
-    Corresponding Source, you remain obligated to ensure that it is
-    available for as long as needed to satisfy these requirements.
-
-    e) Convey the object code using peer-to-peer transmission, provided
-    you inform other peers where the object code and Corresponding
-    Source of the work are being offered to the general public at no
-    charge under subsection 6d.
-
-  A separable portion of the object code, whose source code is excluded
-from the Corresponding Source as a System Library, need not be
-included in conveying the object code work.
-
-  A "User Product" is either (1) a "consumer product", which means any
-tangible personal property which is normally used for personal, family,
-or household purposes, or (2) anything designed or sold for incorporation
-into a dwelling.  In determining whether a product is a consumer product,
-doubtful cases shall be resolved in favor of coverage.  For a particular
-product received by a particular user, "normally used" refers to a
-typical or common use of that class of product, regardless of the status
-of the particular user or of the way in which the particular user
-actually uses, or expects or is expected to use, the product.  A product
-is a consumer product regardless of whether the product has substantial
-commercial, industrial or non-consumer uses, unless such uses represent
-the only significant mode of use of the product.
-
-  "Installation Information" for a User Product means any methods,
-procedures, authorization keys, or other information required to install
-and execute modified versions of a covered work in that User Product from
-a modified version of its Corresponding Source.  The information must
-suffice to ensure that the continued functioning of the modified object
-code is in no case prevented or interfered with solely because
-modification has been made.
-
-  If you convey an object code work under this section in, or with, or
-specifically for use in, a User Product, and the conveying occurs as
-part of a transaction in which the right of possession and use of the
-User Product is transferred to the recipient in perpetuity or for a
-fixed term (regardless of how the transaction is characterized), the
-Corresponding Source conveyed under this section must be accompanied
-by the Installation Information.  But this requirement does not apply
-if neither you nor any third party retains the ability to install
-modified object code on the User Product (for example, the work has
-been installed in ROM).
-
-  The requirement to provide Installation Information does not include a
-requirement to continue to provide support service, warranty, or updates
-for a work that has been modified or installed by the recipient, or for
-the User Product in which it has been modified or installed.  Access to a
-network may be denied when the modification itself materially and
-adversely affects the operation of the network or violates the rules and
-protocols for communication across the network.
-
-  Corresponding Source conveyed, and Installation Information provided,
-in accord with this section must be in a format that is publicly
-documented (and with an implementation available to the public in
-source code form), and must require no special password or key for
-unpacking, reading or copying.
-
-  7. Additional Terms.
-
-  "Additional permissions" are terms that supplement the terms of this
-License by making exceptions from one or more of its conditions.
-Additional permissions that are applicable to the entire Program shall
-be treated as though they were included in this License, to the extent
-that they are valid under applicable law.  If additional permissions
-apply only to part of the Program, that part may be used separately
-under those permissions, but the entire Program remains governed by
-this License without regard to the additional permissions.
-
-  When you convey a copy of a covered work, you may at your option
-remove any additional permissions from that copy, or from any part of
-it.  (Additional permissions may be written to require their own
-removal in certain cases when you modify the work.)  You may place
-additional permissions on material, added by you to a covered work,
-for which you have or can give appropriate copyright permission.
-
-  Notwithstanding any other provision of this License, for material you
-add to a covered work, you may (if authorized by the copyright holders of
-that material) supplement the terms of this License with terms:
-
-    a) Disclaiming warranty or limiting liability differently from the
-    terms of sections 15 and 16 of this License; or
-
-    b) Requiring preservation of specified reasonable legal notices or
-    author attributions in that material or in the Appropriate Legal
-    Notices displayed by works containing it; or
-
-    c) Prohibiting misrepresentation of the origin of that material, or
-    requiring that modified versions of such material be marked in
-    reasonable ways as different from the original version; or
-
-    d) Limiting the use for publicity purposes of names of licensors or
-    authors of the material; or
-
-    e) Declining to grant rights under trademark law for use of some
-    trade names, trademarks, or service marks; or
-
-    f) Requiring indemnification of licensors and authors of that
-    material by anyone who conveys the material (or modified versions of
-    it) with contractual assumptions of liability to the recipient, for
-    any liability that these contractual assumptions directly impose on
-    those licensors and authors.
-
-  All other non-permissive additional terms are considered "further
-restrictions" within the meaning of section 10.  If the Program as you
-received it, or any part of it, contains a notice stating that it is
-governed by this License along with a term that is a further
-restriction, you may remove that term.  If a license document contains
-a further restriction but permits relicensing or conveying under this
-License, you may add to a covered work material governed by the terms
-of that license document, provided that the further restriction does
-not survive such relicensing or conveying.
-
-  If you add terms to a covered work in accord with this section, you
-must place, in the relevant source files, a statement of the
-additional terms that apply to those files, or a notice indicating
-where to find the applicable terms.
-
-  Additional terms, permissive or non-permissive, may be stated in the
-form of a separately written license, or stated as exceptions;
-the above requirements apply either way.
-
-  8. Termination.
-
-  You may not propagate or modify a covered work except as expressly
-provided under this License.  Any attempt otherwise to propagate or
-modify it is void, and will automatically terminate your rights under
-this License (including any patent licenses granted under the third
-paragraph of section 11).
-
-  However, if you cease all violation of this License, then your
-license from a particular copyright holder is reinstated (a)
-provisionally, unless and until the copyright holder explicitly and
-finally terminates your license, and (b) permanently, if the copyright
-holder fails to notify you of the violation by some reasonable means
-prior to 60 days after the cessation.
-
-  Moreover, your license from a particular copyright holder is
-reinstated permanently if the copyright holder notifies you of the
-violation by some reasonable means, this is the first time you have
-received notice of violation of this License (for any work) from that
-copyright holder, and you cure the violation prior to 30 days after
-your receipt of the notice.
-
-  Termination of your rights under this section does not terminate the
-licenses of parties who have received copies or rights from you under
-this License.  If your rights have been terminated and not permanently
-reinstated, you do not qualify to receive new licenses for the same
-material under section 10.
-
-  9. Acceptance Not Required for Having Copies.
-
-  You are not required to accept this License in order to receive or
-run a copy of the Program.  Ancillary propagation of a covered work
-occurring solely as a consequence of using peer-to-peer transmission
-to receive a copy likewise does not require acceptance.  However,
-nothing other than this License grants you permission to propagate or
-modify any covered work.  These actions infringe copyright if you do
-not accept this License.  Therefore, by modifying or propagating a
-covered work, you indicate your acceptance of this License to do so.
-
-  10. Automatic Licensing of Downstream Recipients.
-
-  Each time you convey a covered work, the recipient automatically
-receives a license from the original licensors, to run, modify and
-propagate that work, subject to this License.  You are not responsible
-for enforcing compliance by third parties with this License.
-
-  An "entity transaction" is a transaction transferring control of an
-organization, or substantially all assets of one, or subdividing an
-organization, or merging organizations.  If propagation of a covered
-work results from an entity transaction, each party to that
-transaction who receives a copy of the work also receives whatever
-licenses to the work the party's predecessor in interest had or could
-give under the previous paragraph, plus a right to possession of the
-Corresponding Source of the work from the predecessor in interest, if
-the predecessor has it or can get it with reasonable efforts.
-
-  You may not impose any further restrictions on the exercise of the
-rights granted or affirmed under this License.  For example, you may
-not impose a license fee, royalty, or other charge for exercise of
-rights granted under this License, and you may not initiate litigation
-(including a cross-claim or counterclaim in a lawsuit) alleging that
-any patent claim is infringed by making, using, selling, offering for
-sale, or importing the Program or any portion of it.
-
-  11. Patents.
-
-  A "contributor" is a copyright holder who authorizes use under this
-License of the Program or a work on which the Program is based.  The
-work thus licensed is called the contributor's "contributor version".
-
-  A contributor's "essential patent claims" are all patent claims
-owned or controlled by the contributor, whether already acquired or
-hereafter acquired, that would be infringed by some manner, permitted
-by this License, of making, using, or selling its contributor version,
-but do not include claims that would be infringed only as a
-consequence of further modification of the contributor version.  For
-purposes of this definition, "control" includes the right to grant
-patent sublicenses in a manner consistent with the requirements of
-this License.
-
-  Each contributor grants you a non-exclusive, worldwide, royalty-free
-patent license under the contributor's essential patent claims, to
-make, use, sell, offer for sale, import and otherwise run, modify and
-propagate the contents of its contributor version.
-
-  In the following three paragraphs, a "patent license" is any express
-agreement or commitment, however denominated, not to enforce a patent
-(such as an express permission to practice a patent or covenant not to
-sue for patent infringement).  To "grant" such a patent license to a
-party means to make such an agreement or commitment not to enforce a
-patent against the party.
-
-  If you convey a covered work, knowingly relying on a patent license,
-and the Corresponding Source of the work is not available for anyone
-to copy, free of charge and under the terms of this License, through a
-publicly available network server or other readily accessible means,
-then you must either (1) cause the Corresponding Source to be so
-available, or (2) arrange to deprive yourself of the benefit of the
-patent license for this particular work, or (3) arrange, in a manner
-consistent with the requirements of this License, to extend the patent
-license to downstream recipients.  "Knowingly relying" means you have
-actual knowledge that, but for the patent license, your conveying the
-covered work in a country, or your recipient's use of the covered work
-in a country, would infringe one or more identifiable patents in that
-country that you have reason to believe are valid.
-
-  If, pursuant to or in connection with a single transaction or
-arrangement, you convey, or propagate by procuring conveyance of, a
-covered work, and grant a patent license to some of the parties
-receiving the covered work authorizing them to use, propagate, modify
-or convey a specific copy of the covered work, then the patent license
-you grant is automatically extended to all recipients of the covered
-work and works based on it.
-
-  A patent license is "discriminatory" if it does not include within
-the scope of its coverage, prohibits the exercise of, or is
-conditioned on the non-exercise of one or more of the rights that are
-specifically granted under this License.  You may not convey a covered
-work if you are a party to an arrangement with a third party that is
-in the business of distributing software, under which you make payment
-to the third party based on the extent of your activity of conveying
-the work, and under which the third party grants, to any of the
-parties who would receive the covered work from you, a discriminatory
-patent license (a) in connection with copies of the covered work
-conveyed by you (or copies made from those copies), or (b) primarily
-for and in connection with specific products or compilations that
-contain the covered work, unless you entered into that arrangement,
-or that patent license was granted, prior to 28 March 2007.
-
-  Nothing in this License shall be construed as excluding or limiting
-any implied license or other defenses to infringement that may
-otherwise be available to you under applicable patent law.
-
-  12. No Surrender of Others' Freedom.
-
-  If conditions are imposed on you (whether by court order, agreement or
-otherwise) that contradict the conditions of this License, they do not
-excuse you from the conditions of this License.  If you cannot convey a
-covered work so as to satisfy simultaneously your obligations under this
-License and any other pertinent obligations, then as a consequence you may
-not convey it at all.  For example, if you agree to terms that obligate you
-to collect a royalty for further conveying from those to whom you convey
-the Program, the only way you could satisfy both those terms and this
-License would be to refrain entirely from conveying the Program.
-
-  13. Use with the GNU Affero General Public License.
-
-  Notwithstanding any other provision of this License, you have
-permission to link or combine any covered work with a work licensed
-under version 3 of the GNU Affero General Public License into a single
-combined work, and to convey the resulting work.  The terms of this
-License will continue to apply to the part which is the covered work,
-but the special requirements of the GNU Affero General Public License,
-section 13, concerning interaction through a network will apply to the
-combination as such.
-
-  14. Revised Versions of this License.
-
-  The Free Software Foundation may publish revised and/or new versions of
-the GNU General Public License from time to time.  Such new versions will
-be similar in spirit to the present version, but may differ in detail to
-address new problems or concerns.
-
-  Each version is given a distinguishing version number.  If the
-Program specifies that a certain numbered version of the GNU General
-Public License "or any later version" applies to it, you have the
-option of following the terms and conditions either of that numbered
-version or of any later version published by the Free Software
-Foundation.  If the Program does not specify a version number of the
-GNU General Public License, you may choose any version ever published
-by the Free Software Foundation.
-
-  If the Program specifies that a proxy can decide which future
-versions of the GNU General Public License can be used, that proxy's
-public statement of acceptance of a version permanently authorizes you
-to choose that version for the Program.
-
-  Later license versions may give you additional or different
-permissions.  However, no additional obligations are imposed on any
-author or copyright holder as a result of your choosing to follow a
-later version.
-
-  15. Disclaimer of Warranty.
-
-  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
-APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
-HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
-OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
-THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
-IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
-ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
-
-  16. Limitation of Liability.
-
-  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
-THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
-GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
-USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
-DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
-PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
-EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGES.
-
-  17. Interpretation of Sections 15 and 16.
-
-  If the disclaimer of warranty and limitation of liability provided
-above cannot be given local legal effect according to their terms,
-reviewing courts shall apply local law that most closely approximates
-an absolute waiver of all civil liability in connection with the
-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
-
-                     END OF TERMS AND CONDITIONS
-
-            How to Apply These Terms to Your New Programs
-
-  If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-    <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) <year>  <name of author>
-
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-Also add information on how to contact you by electronic and paper mail.
-
-  If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
-    <program>  Copyright (C) <year>  <name of author>
-    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-    This is free software, and you are welcome to redistribute it
-    under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
-
-  You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-<http://www.gnu.org/licenses/>.
-
-  The GNU General Public License does not permit incorporating your program
-into proprietary programs.  If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.  But first, please read
-<http://www.gnu.org/philosophy/why-not-lgpl.html>.

camelot/ext/ghostscript/__init__.py

@@ -1,96 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-"""
-ghostscript - A Python interface for the Ghostscript interpreter C-API
-"""
-#
-# Modifications 2018 by Vinayak Mehta <vmehta94@gmail.com>
-# Copyright 2010-2018 by Hartmut Goebel <h.goebel@crazy-compilers.com>
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see <http://www.gnu.org/licenses/>.
-#
-
-from . import _gsprint as gs
-
-
-__author__ = 'Hartmut Goebel <h.goebel@crazy-compilers.com>'
-__copyright__ = 'Copyright 2010-2018 by Hartmut Goebel <h.goebel@crazy-compilers.com>'
-__license__ = 'GNU General Public License version 3 (GPL v3)'
-__version__ = '0.6'
-
-
-class __Ghostscript(object):
-    def __init__(self, instance, args, stdin=None, stdout=None, stderr=None):
-        self._initialized = False
-        self._callbacks = None
-        if stdin or stdout or stderr:
-            self.set_stdio(stdin, stdout, stderr)
-        rc = gs.init_with_args(instance, args)
-        self._initialized = True
-        if rc == gs.e_Quit:
-            self.exit()
-
-    def __enter__(self):
-        return self
-
-    def __exit__(self, *args):
-        self.exit()
-
-    def set_stdio(self, stdin=None, stdout=None, stderr=None):
-        """Set stdin, stdout and stderr of the ghostscript interpreter.
-
-        The ``stdin`` stream has to support the ``readline()``
-        interface. The ``stdout`` and ``stderr`` streams have to
-        support the ``write()`` and ``flush()`` interface.
-
-        Please note that this does not affect the input- and output-
-        streams of the devices. Esp. setting stdout does not allow
-        catching the devise-output even when using ``-sOutputFile=-``.
-
-        """
-        global __instance__
-        self._callbacks = (
-            stdin and gs._wrap_stdin(stdin) or None,
-            stdout and gs._wrap_stdout(stdout) or None,
-            stderr and gs._wrap_stderr(stderr) or None,
-        )
-        gs.set_stdio(__instance__, *self._callbacks)
-
-    def __del__(self):
-        self.exit()
-
-    def exit(self):
-        global __instance__
-        if self._initialized:
-            if __instance__ is not None:
-                gs.exit(__instance__)
-                gs.delete_instance(__instance__)
-                __instance__ = None
-            self._initialized = False
-
-
-def Ghostscript(*args, **kwargs):
-    """Factory function for setting up a Ghostscript instance
-    """
-    global __instance__
-    # Ghostscript only supports a single instance
-    if __instance__ is None:
-        __instance__ = gs.new_instance()
-    return __Ghostscript(__instance__, args,
-                         stdin=kwargs.get('stdin', None),
-                         stdout=kwargs.get('stdout', None),
-                         stderr=kwargs.get('stderr', None))
-
-
-__instance__ = None

camelot/ext/ghostscript/_gsprint.py

@@ -1,243 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-"""
-ghostscript._gsprint - A low-level interface to the Ghostscript C-API using ctypes
-"""
-#
-# Modifications 2018 by Vinayak Mehta <vmehta94@gmail.com>
-# Copyright 2010-2018 by Hartmut Goebel <h.goebel@crazy-compilers.com>
-#
-# Display_callback Structure by Lasse Fister <commander@graphicore.de> in 2013
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see <http://www.gnu.org/licenses/>.
-#
-
-import sys
-from ctypes import *
-
-
-# base/gserrors.h
-#
-# Internal code for a normal exit when usage info is displayed.
-# This allows Window versions of Ghostscript to pause until
-# the message can be read.
-#
-e_Info = -110
-
-#
-# Internal code for the .quit operator.
-# The real quit code is an integer on the operand stack.
-# gs_interpret returns this only for a .quit with a zero exit code.
-#
-e_Quit = -101
-
-__author__ = 'Hartmut Goebel <h.goebel@crazy-compilers.com>'
-__copyright__ = 'Copyright 2010-2018 by Hartmut Goebel <h.goebel@crazy-compilers.com>'
-__license__ = 'GNU General Public License version 3 (GPL v3)'
-__version__ = '0.6'
-
-gs_main_instance = c_void_p
-display_callback = c_void_p
-
-# https://www.ghostscript.com/doc/current/API.htm
-
-
-class GhostscriptError(Exception):
-    def __init__(self, ecode):
-         self.code = ecode
-
-
-def new_instance():
-    """Create a new instance of Ghostscript
-
-    This instance is passed to most other API functions.
-    """
-    # :todo: The caller_handle will be provided to callback functions.
-    display_callback = None
-    instance = gs_main_instance()
-    rc = libgs.gsapi_new_instance(pointer(instance), display_callback)
-    if rc != 0:
-        raise GhostscriptError(rc)
-    return instance
-
-
-def delete_instance(instance):
-    """Destroy an instance of Ghostscript
-
-    Before you call this, Ghostscript must have finished.
-    If Ghostscript has been initialised, you must call exit()
-    before delete_instance()
-    """
-    return libgs.gsapi_delete_instance(instance)
-
-
-c_stdstream_call_t = CFUNCTYPE(c_int, gs_main_instance, POINTER(c_char), c_int)
-
-
-def _wrap_stdin(infp):
-    """Wrap a filehandle into a C function to be used as `stdin` callback
-    for ``set_stdio``. The filehandle has to support the readline() method.
-    """
-    def _wrap(instance, dest, count):
-        try:
-            data = infp.readline(count)
-        except:
-            count = -1
-        else:
-            if not data:
-                count = 0
-            else:
-                count = len(data)
-                memmove(dest, c_char_p(data), count)
-        return count
-
-    return c_stdstream_call_t(_wrap)
-
-
-def _wrap_stdout(outfp):
-    """Wrap a filehandle into a C function to be used as `stdout` or
-    `stderr` callback for ``set_stdio``. The filehandle has to support the
-    write() and flush() methods.
-    """
-    def _wrap(instance, str, count):
-        outfp.write(str[:count])
-        outfp.flush()
-        return count
-
-    return c_stdstream_call_t(_wrap)
-
-
-_wrap_stderr = _wrap_stdout
-
-
-def set_stdio(instance, stdin, stdout, stderr):
-    """Set the callback functions for stdio.
-
-    ``stdin``, ``stdout`` and ``stderr`` have to be ``ctypes``
-    callback functions matching the ``_gsprint.c_stdstream_call_t``
-    prototype. You may want to use _wrap_* to wrap file handles.
-
-    Note 1: This function only changes stdio of the Postscript
-    interpreter, not that of the devices.
-
-    Note 2: Make sure you keep references to C function objects
-    as long as they are used from C code. Otherwise they may be
-    garbage collected, crashing your program when a callback is made.
-
-    The ``stdin`` callback function should return the number of
-    characters read, `0` for EOF, or `-1` for error. The `stdout` and
-    `stderr` callback functions should return the number of characters
-    written.
-
-    You may pass ``None`` for any of stdin, stdout or stderr , in which
-    case the system stdin, stdout resp. stderr will be used.
-    """
-    rc = libgs.gsapi_set_stdio(instance, stdin, stdout, stderr)
-    if rc not in (0, e_Quit, e_Info):
-        raise GhostscriptError(rc)
-    return rc
-
-
-def init_with_args(instance, argv):
-    """Initialise the interpreter
-
-    1. If quit or EOF occur during init_with_args(), the return value
-       will be e_Quit. This is not an error. You must call exit() and
-       must not call any other functions.
-
-    2. If usage info should be displayed, the return value will be
-       e_Info which is not an error. Do not call exit().
-
-    3. Under normal conditions this returns 0. You would then call one
-       or more run_*() functions and then finish with exit()
-    """
-    ArgArray = c_char_p * len(argv)
-    c_argv = ArgArray(*argv)
-    rc = libgs.gsapi_init_with_args(instance, len(argv), c_argv)
-    if rc not in (0, e_Quit, e_Info):
-        raise GhostscriptError(rc)
-    return rc
-
-
-def exit(instance):
-    """Exit the interpreter
-
-    This must be called on shutdown if init_with_args() has been
-    called, and just before delete_instance()
-    """
-    rc = libgs.gsapi_exit(instance)
-    if rc != 0:
-        raise GhostscriptError(rc)
-    return rc
-
-
-def __win32_finddll():
-    try:
-        import winreg
-    except ImportError:
-        # assume Python 2
-        from _winreg import OpenKey, CloseKey, EnumKey, QueryValueEx, \
-            QueryInfoKey, HKEY_LOCAL_MACHINE
-    else:
-        from winreg import OpenKey, CloseKey, EnumKey, QueryValueEx, \
-            QueryInfoKey, HKEY_LOCAL_MACHINE
-
-    from distutils.version import LooseVersion
-    import os
-
-    dlls = []
-    # Look up different variants of Ghostscript and take the highest
-    # version for which the DLL is to be found in the filesystem.
-    for key_name in ('AFPL Ghostscript', 'Aladdin Ghostscript',
-                     'GNU Ghostscript', 'GPL Ghostscript'):
-        try:
-            k1 = OpenKey(HKEY_LOCAL_MACHINE, "Software\\%s" % key_name)
-            for num in range(0, QueryInfoKey(k1)[0]):
-                version = EnumKey(k1, num)
-                try:
-                    k2 = OpenKey(k1, version)
-                    dll_path = QueryValueEx(k2, 'GS_DLL')[0]
-                    CloseKey(k2)
-                    if os.path.exists(dll_path):
-                        dlls.append((LooseVersion(version), dll_path))
-                except WindowsError:
-                    pass
-            CloseKey(k1)
-        except WindowsError:
-            pass
-    if dlls:
-        dlls.sort()
-        return dlls[-1][-1]
-    else:
-        return None
-
-
-if sys.platform == 'win32':
-    libgs = __win32_finddll()
-    if not libgs:
-        raise RuntimeError('Please make sure that Ghostscript is installed')
-    libgs = windll.LoadLibrary(libgs)
-else:
-    try:
-        libgs = cdll.LoadLibrary('libgs.so')
-    except OSError:
-        # shared object file not found
-        import ctypes.util
-
-        libgs = ctypes.util.find_library('gs')
-        if not libgs:
-            raise RuntimeError('Please make sure that Ghostscript is installed')
-        libgs = cdll.LoadLibrary(libgs)
-
-del __win32_finddll

camelot/handlers.py

@@ -7,8 +7,14 @@ from PyPDF2 import PdfFileReader, PdfFileWriter
 
 from .core import TableList
 from .parsers import Stream, Lattice
-from .utils import (TemporaryDirectory, get_page_layout, get_text_objects,
-                    get_rotation, is_url, download_url)
+from .utils import (
+    TemporaryDirectory,
+    get_page_layout,
+    get_text_objects,
+    get_rotation,
+    is_url,
+    download_url,
+)
 
 
 class PDFHandler(object):
@@ -27,21 +33,23 @@ class PDFHandler(object):
         Password for decryption.
 
     """
-    def __init__(self, filepath, pages='1', password=None):
+
+    def __init__(self, filepath, pages="1", password=None):
         if is_url(filepath):
             filepath = download_url(filepath)
         self.filepath = filepath
-        if not filepath.lower().endswith('.pdf'):
-            raise NotImplementedError("File format not supported")
-        self.pages = self._get_pages(self.filepath, pages)
+        # if not filepath.lower().endswith(".pdf"):
+        #     raise NotImplementedError("File format not supported")
+
         if password is None:
-            self.password = ''
+            self.password = ""
         else:
             self.password = password
             if sys.version_info[0] < 3:
-                self.password = self.password.encode('ascii')
+                self.password = self.password.encode("ascii")
+        self.pages = self._get_pages(pages)
 
-    def _get_pages(self, filepath, pages):
+    def _get_pages(self, pages):
         """Converts pages string to list of ints.
 
         Parameters
@@ -59,26 +67,31 @@ class PDFHandler(object):
 
         """
         page_numbers = []
-        if pages == '1':
-            page_numbers.append({'start': 1, 'end': 1})
+
+        if pages == "1":
+            page_numbers.append({"start": 1, "end": 1})
         else:
-            infile = PdfFileReader(open(filepath, 'rb'), strict=False)
+            with open(self.filepath, "rb") as f:
+                infile = PdfFileReader(f, strict=False)
+
                 if infile.isEncrypted:
                     infile.decrypt(self.password)
-            if pages == 'all':
-                page_numbers.append({'start': 1, 'end': infile.getNumPages()})
+
+                if pages == "all":
+                    page_numbers.append({"start": 1, "end": infile.getNumPages()})
                 else:
-                for r in pages.split(','):
-                    if '-' in r:
-                        a, b = r.split('-')
-                        if b == 'end':
+                    for r in pages.split(","):
+                        if "-" in r:
+                            a, b = r.split("-")
+                            if b == "end":
                                 b = infile.getNumPages()
-                        page_numbers.append({'start': int(a), 'end': int(b)})
+                            page_numbers.append({"start": int(a), "end": int(b)})
                         else:
-                        page_numbers.append({'start': int(r), 'end': int(r)})
+                            page_numbers.append({"start": int(r), "end": int(r)})
+
         P = []
         for p in page_numbers:
-            P.extend(range(p['start'], p['end'] + 1))
+            P.extend(range(p["start"], p["end"] + 1))
         return sorted(set(P))
 
     def _save_page(self, filepath, page, temp):
@@ -94,16 +107,16 @@ class PDFHandler(object):
             Tmp directory.
 
         """
-        with open(filepath, 'rb') as fileobj:
+        with open(filepath, "rb") as fileobj:
             infile = PdfFileReader(fileobj, strict=False)
             if infile.isEncrypted:
                 infile.decrypt(self.password)
-            fpath = os.path.join(temp, 'page-{0}.pdf'.format(page))
+            fpath = os.path.join(temp, f"page-{page}.pdf")
             froot, fext = os.path.splitext(fpath)
             p = infile.getPage(page - 1)
             outfile = PdfFileWriter()
             outfile.addPage(p)
-            with open(fpath, 'wb') as f:
+            with open(fpath, "wb") as f:
                 outfile.write(f)
             layout, dim = get_page_layout(fpath)
             # fix rotated PDF
@@ -111,23 +124,27 @@ class PDFHandler(object):
             horizontal_text = get_text_objects(layout, ltype="horizontal_text")
             vertical_text = get_text_objects(layout, ltype="vertical_text")
             rotation = get_rotation(chars, horizontal_text, vertical_text)
-            if rotation != '':
-                fpath_new = ''.join([froot.replace('page', 'p'), '_rotated', fext])
+            if rotation != "":
+                fpath_new = "".join([froot.replace("page", "p"), "_rotated", fext])
                 os.rename(fpath, fpath_new)
-                infile = PdfFileReader(open(fpath_new, 'rb'), strict=False)
+                instream = open(fpath_new, "rb")
+                infile = PdfFileReader(instream, strict=False)
                 if infile.isEncrypted:
                     infile.decrypt(self.password)
                 outfile = PdfFileWriter()
                 p = infile.getPage(0)
-                if rotation == 'anticlockwise':
+                if rotation == "anticlockwise":
                     p.rotateClockwise(90)
-                elif rotation == 'clockwise':
+                elif rotation == "clockwise":
                     p.rotateCounterClockwise(90)
                 outfile.addPage(p)
-                with open(fpath, 'wb') as f:
+                with open(fpath, "wb") as f:
                     outfile.write(f)
+                instream.close()
 
-    def parse(self, flavor='lattice', suppress_stdout=False, layout_kwargs={}, **kwargs):
+    def parse(
+        self, flavor="lattice", suppress_stdout=False, layout_kwargs={}, **kwargs
+    ):
         """Extracts tables by calling parser.get_tables on all single
         page PDFs.
 
@@ -153,11 +170,11 @@ class PDFHandler(object):
         with TemporaryDirectory() as tempdir:
             for p in self.pages:
                 self._save_page(self.filepath, p, tempdir)
-            pages = [os.path.join(tempdir, 'page-{0}.pdf'.format(p))
-                     for p in self.pages]
-            parser = Lattice(**kwargs) if flavor == 'lattice' else Stream(**kwargs)
+            pages = [os.path.join(tempdir, f"page-{p}.pdf") for p in self.pages]
+            parser = Lattice(**kwargs) if flavor == "lattice" else Stream(**kwargs)
             for p in pages:
-                t = parser.extract_tables(p, suppress_stdout=suppress_stdout,
-                                          layout_kwargs=layout_kwargs)
+                t = parser.extract_tables(
+                    p, suppress_stdout=suppress_stdout, layout_kwargs=layout_kwargs
+                )
                 tables.extend(t)
-        return TableList(tables)
+        return TableList(sorted(tables))

camelot/image_processing.py

@@ -1,7 +1,5 @@
 # -*- coding: utf-8 -*-
 
-from __future__ import division
-
 import cv2
 import numpy as np
 
@@ -39,17 +37,23 @@ def adaptive_threshold(imagename, process_background=False, blocksize=15, c=-2):
 
     if process_background:
         threshold = cv2.adaptiveThreshold(
-            gray, 255, cv2.ADAPTIVE_THRESH_GAUSSIAN_C,
-            cv2.THRESH_BINARY, blocksize, c)
+            gray, 255, cv2.ADAPTIVE_THRESH_GAUSSIAN_C, cv2.THRESH_BINARY, blocksize, c
+        )
     else:
         threshold = cv2.adaptiveThreshold(
-            np.invert(gray), 255,
-            cv2.ADAPTIVE_THRESH_GAUSSIAN_C, cv2.THRESH_BINARY, blocksize, c)
+            np.invert(gray),
+            255,
+            cv2.ADAPTIVE_THRESH_GAUSSIAN_C,
+            cv2.THRESH_BINARY,
+            blocksize,
+            c,
+        )
     return img, threshold
 
 
-def find_lines(threshold, regions=None, direction='horizontal',
-               line_scale=15, iterations=0):
+def find_lines(
+    threshold, regions=None, direction="horizontal", line_scale=15, iterations=0
+):
     """Finds horizontal and vertical lines by applying morphological
     transformations on an image.
 
@@ -87,15 +91,14 @@ def find_lines(threshold, regions=None, direction='horizontal',
     """
     lines = []
 
-    if direction == 'vertical':
+    if direction == "vertical":
         size = threshold.shape[0] // line_scale
         el = cv2.getStructuringElement(cv2.MORPH_RECT, (1, size))
-    elif direction == 'horizontal':
+    elif direction == "horizontal":
         size = threshold.shape[1] // line_scale
         el = cv2.getStructuringElement(cv2.MORPH_RECT, (size, 1))
     elif direction is None:
-        raise ValueError("Specify direction as either 'vertical' or"
-                         " 'horizontal'")
+        raise ValueError("Specify direction as either 'vertical' or 'horizontal'")
 
     if regions is not None:
         region_mask = np.zeros(threshold.shape)
@@ -110,19 +113,21 @@ def find_lines(threshold, regions=None, direction='horizontal',
 
     try:
         _, contours, _ = cv2.findContours(
-            threshold.astype(np.uint8), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
+            threshold.astype(np.uint8), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE
+        )
     except ValueError:
         # for opencv backward compatibility
         contours, _ = cv2.findContours(
-            threshold.astype(np.uint8), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
+            threshold.astype(np.uint8), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE
+        )
 
     for c in contours:
         x, y, w, h = cv2.boundingRect(c)
         x1, x2 = x, x + w
         y1, y2 = y, y + h
-        if direction == 'vertical':
+        if direction == "vertical":
             lines.append(((x1 + x2) // 2, y2, (x1 + x2) // 2, y1))
-        elif direction == 'horizontal':
+        elif direction == "horizontal":
             lines.append((x1, (y1 + y2) // 2, x2, (y1 + y2) // 2))
 
     return dmask, lines
@@ -150,11 +155,13 @@ def find_contours(vertical, horizontal):
 
     try:
         __, contours, __ = cv2.findContours(
-            mask.astype(np.uint8), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
+            mask.astype(np.uint8), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE
+        )
     except ValueError:
         # for opencv backward compatibility
         contours, __ = cv2.findContours(
-            mask.astype(np.uint8), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
+            mask.astype(np.uint8), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE
+        )
     # sort in reverse based on contour area and use first 10 contours
     contours = sorted(contours, key=cv2.contourArea, reverse=True)[:10]
 
@@ -196,11 +203,13 @@ def find_joints(contours, vertical, horizontal):
         roi = joints[y : y + h, x : x + w]
         try:
             __, jc, __ = cv2.findContours(
-                roi.astype(np.uint8), cv2.RETR_CCOMP, cv2.CHAIN_APPROX_SIMPLE)
+                roi.astype(np.uint8), cv2.RETR_CCOMP, cv2.CHAIN_APPROX_SIMPLE
+            )
         except ValueError:
             # for opencv backward compatibility
             jc, __ = cv2.findContours(
-                roi.astype(np.uint8), cv2.RETR_CCOMP, cv2.CHAIN_APPROX_SIMPLE)
+                roi.astype(np.uint8), cv2.RETR_CCOMP, cv2.CHAIN_APPROX_SIMPLE
+            )
         if len(jc) <= 4:  # remove contours with less than 4 joints
             continue
         joint_coords = []

camelot/io.py

@@ -6,8 +6,15 @@ from .handlers import PDFHandler
 from .utils import validate_input, remove_extra
 
 
-def read_pdf(filepath, pages='1', password=None, flavor='lattice',
-             suppress_stdout=False, layout_kwargs={}, **kwargs):
+def read_pdf(
+    filepath,
+    pages="1",
+    password=None,
+    flavor="lattice",
+    suppress_stdout=False,
+    layout_kwargs={},
+    **kwargs
+):
     """Read PDF and return extracted tables.
 
     Note: kwargs annotated with ^ can only be used with flavor='stream'
@@ -91,9 +98,10 @@ def read_pdf(filepath, pages='1', password=None, flavor='lattice',
     tables : camelot.core.TableList
 
     """
-    if flavor not in ['lattice', 'stream']:
-        raise NotImplementedError("Unknown flavor specified."
-                                  " Use either 'lattice' or 'stream'")
+    if flavor not in ["lattice", "stream"]:
+        raise NotImplementedError(
+            "Unknown flavor specified." " Use either 'lattice' or 'stream'"
+        )
 
     with warnings.catch_warnings():
         if suppress_stdout:
@@ -102,6 +110,10 @@ def read_pdf(filepath, pages='1', password=None, flavor='lattice',
         validate_input(kwargs, flavor=flavor)
         p = PDFHandler(filepath, pages=pages, password=password)
         kwargs = remove_extra(kwargs, flavor=flavor)
-        tables = p.parse(flavor=flavor, suppress_stdout=suppress_stdout,
-                         layout_kwargs=layout_kwargs, **kwargs)
+        tables = p.parse(
+            flavor=flavor,
+            suppress_stdout=suppress_stdout,
+            layout_kwargs=layout_kwargs,
+            **kwargs
+        )
         return tables

camelot/parsers/base.py

@@ -6,15 +6,15 @@ from ..utils import get_page_layout, get_text_objects
 
 
 class BaseParser(object):
-    """Defines a base parser.
-    """
+    """Defines a base parser."""
+
     def _generate_layout(self, filename, layout_kwargs):
         self.filename = filename
         self.layout_kwargs = layout_kwargs
-        self.layout, self.dimensions = get_page_layout(
-            filename, **layout_kwargs)
-        self.images = get_text_objects(self.layout, ltype='image')
-        self.horizontal_text = get_text_objects(self.layout, ltype='horizontal_text')
-        self.vertical_text = get_text_objects(self.layout, ltype='vertical_text')
+        self.layout, self.dimensions = get_page_layout(filename, **layout_kwargs)
+        self.images = get_text_objects(self.layout, ltype="image")
+        self.horizontal_text = get_text_objects(self.layout, ltype="horizontal_text")
+        self.vertical_text = get_text_objects(self.layout, ltype="vertical_text")
         self.pdf_width, self.pdf_height = self.dimensions
         self.rootname, __ = os.path.splitext(self.filename)
+        self.imagename = "".join([self.rootname, ".png"])

camelot/parsers/lattice.py

@@ -1,28 +1,37 @@
 # -*- coding: utf-8 -*-
 
-from __future__ import division
 import os
 import sys
 import copy
 import locale
 import logging
 import warnings
-import subprocess
 
 import numpy as np
 import pandas as pd
 
 from .base import BaseParser
 from ..core import Table
-from ..ext.ghostscript import Ghostscript
-from ..utils import (scale_image, scale_pdf, segments_in_bbox, text_in_bbox,
-                     merge_close_lines, get_table_index, compute_accuracy,
-                     compute_whitespace)
-from ..image_processing import (adaptive_threshold, find_lines,
-                                find_contours, find_joints)
+from ..utils import (
+    scale_image,
+    scale_pdf,
+    segments_in_bbox,
+    text_in_bbox,
+    merge_close_lines,
+    get_table_index,
+    compute_accuracy,
+    compute_whitespace,
+)
+from ..image_processing import (
+    adaptive_threshold,
+    find_lines,
+    find_contours,
+    find_joints,
+)
+from ..backends.image_conversion import BACKENDS
 
 
-logger = logging.getLogger('camelot')
+logger = logging.getLogger("camelot")
 
 
 class Lattice(BaseParser):
@@ -84,11 +93,27 @@ class Lattice(BaseParser):
         Resolution used for PDF to PNG conversion.
 
     """
-    def __init__(self, table_regions=None, table_areas=None, process_background=False,
-                 line_scale=15, copy_text=None, shift_text=['l', 't'],
-                 split_text=False, flag_size=False, strip_text='', line_tol=2,
-                 joint_tol=2, threshold_blocksize=15, threshold_constant=-2,
-                 iterations=0, resolution=300, **kwargs):
+
+    def __init__(
+        self,
+        table_regions=None,
+        table_areas=None,
+        process_background=False,
+        line_scale=15,
+        copy_text=None,
+        shift_text=["l", "t"],
+        split_text=False,
+        flag_size=False,
+        strip_text="",
+        line_tol=2,
+        joint_tol=2,
+        threshold_blocksize=15,
+        threshold_constant=-2,
+        iterations=0,
+        resolution=300,
+        backend="ghostscript",
+        **kwargs,
+    ):
         self.table_regions = table_regions
         self.table_areas = table_areas
         self.process_background = process_background
@@ -104,6 +129,37 @@ class Lattice(BaseParser):
         self.threshold_constant = threshold_constant
         self.iterations = iterations
         self.resolution = resolution
+        self.backend = Lattice._get_backend(backend)
+
+    @staticmethod
+    def _get_backend(backend):
+        def implements_convert():
+            methods = [
+                method for method in dir(backend) if method.startswith("__") is False
+            ]
+            return "convert" in methods
+
+        if isinstance(backend, str):
+            if backend not in BACKENDS.keys():
+                raise NotImplementedError(
+                    f"Unknown backend '{backend}' specified. Please use either 'poppler' or 'ghostscript'."
+                )
+
+            if backend == "ghostscript":
+                warnings.warn(
+                    "'ghostscript' will be replaced by 'poppler' as the default image conversion"
+                    " backend in v0.12.0. You can try out 'poppler' with backend='poppler'.",
+                    DeprecationWarning,
+                )
+
+            return BACKENDS[backend]()
+        else:
+            if not implements_convert():
+                raise NotImplementedError(
+                    f"'{backend}' must implement a 'convert' method"
+                )
+
+            return backend
 
     @staticmethod
     def _reduce_index(t, idx, shift_text):
@@ -131,19 +187,19 @@ class Lattice(BaseParser):
         indices = []
         for r_idx, c_idx, text in idx:
             for d in shift_text:
-                if d == 'l':
+                if d == "l":
                     if t.cells[r_idx][c_idx].hspan:
                         while not t.cells[r_idx][c_idx].left:
                             c_idx -= 1
-                if d == 'r':
+                if d == "r":
                     if t.cells[r_idx][c_idx].hspan:
                         while not t.cells[r_idx][c_idx].right:
                             c_idx += 1
-                if d == 't':
+                if d == "t":
                     if t.cells[r_idx][c_idx].vspan:
                         while not t.cells[r_idx][c_idx].top:
                             r_idx -= 1
-                if d == 'b':
+                if d == "b":
                     if t.cells[r_idx][c_idx].vspan:
                         while not t.cells[r_idx][c_idx].bottom:
                             r_idx += 1
@@ -172,27 +228,17 @@ class Lattice(BaseParser):
             if f == "h":
                 for i in range(len(t.cells)):
                     for j in range(len(t.cells[i])):
-                        if t.cells[i][j].text.strip() == '':
+                        if t.cells[i][j].text.strip() == "":
                             if t.cells[i][j].hspan and not t.cells[i][j].left:
                                 t.cells[i][j].text = t.cells[i][j - 1].text
             elif f == "v":
                 for i in range(len(t.cells)):
                     for j in range(len(t.cells[i])):
-                        if t.cells[i][j].text.strip() == '':
+                        if t.cells[i][j].text.strip() == "":
                             if t.cells[i][j].vspan and not t.cells[i][j].top:
                                 t.cells[i][j].text = t.cells[i - 1][j].text
         return t
 
-    def _generate_image(self):
-        self.imagename = ''.join([self.rootname, '.png'])
-        gs_call = '-q -sDEVICE=png16m -o {} -r300 {}'.format(
-            self.imagename, self.filename)
-        gs_call = gs_call.encode().split()
-        null = open(os.devnull, 'wb')
-        with Ghostscript(*gs_call, stdout=null) as gs:
-            pass
-        null.close()
-
     def _generate_table_bbox(self):
         def scale_areas(areas):
             scaled_areas = []
@@ -207,8 +253,11 @@ class Lattice(BaseParser):
             return scaled_areas
 
         self.image, self.threshold = adaptive_threshold(
-            self.imagename, process_background=self.process_background,
-            blocksize=self.threshold_blocksize, c=self.threshold_constant)
+            self.imagename,
+            process_background=self.process_background,
+            blocksize=self.threshold_blocksize,
+            c=self.threshold_constant,
+        )
 
         image_width = self.image.shape[1]
         image_height = self.image.shape[0]
@@ -225,21 +274,35 @@ class Lattice(BaseParser):
                 regions = scale_areas(self.table_regions)
 
             vertical_mask, vertical_segments = find_lines(
-                self.threshold, regions=regions, direction='vertical',
-                line_scale=self.line_scale, iterations=self.iterations)
+                self.threshold,
+                regions=regions,
+                direction="vertical",
+                line_scale=self.line_scale,
+                iterations=self.iterations,
+            )
             horizontal_mask, horizontal_segments = find_lines(
-                self.threshold, regions=regions, direction='horizontal',
-                line_scale=self.line_scale, iterations=self.iterations)
+                self.threshold,
+                regions=regions,
+                direction="horizontal",
+                line_scale=self.line_scale,
+                iterations=self.iterations,
+            )
 
             contours = find_contours(vertical_mask, horizontal_mask)
             table_bbox = find_joints(contours, vertical_mask, horizontal_mask)
         else:
             vertical_mask, vertical_segments = find_lines(
-                self.threshold, direction='vertical', line_scale=self.line_scale,
-                iterations=self.iterations)
+                self.threshold,
+                direction="vertical",
+                line_scale=self.line_scale,
+                iterations=self.iterations,
+            )
             horizontal_mask, horizontal_segments = find_lines(
-                self.threshold, direction='horizontal', line_scale=self.line_scale,
-                iterations=self.iterations)
+                self.threshold,
+                direction="horizontal",
+                line_scale=self.line_scale,
+                iterations=self.iterations,
+            )
 
             areas = scale_areas(self.table_areas)
             table_bbox = find_joints(areas, vertical_mask, horizontal_mask)
@@ -247,18 +310,20 @@ class Lattice(BaseParser):
         self.table_bbox_unscaled = copy.deepcopy(table_bbox)
 
         self.table_bbox, self.vertical_segments, self.horizontal_segments = scale_image(
-            table_bbox, vertical_segments, horizontal_segments, pdf_scalers)
+            table_bbox, vertical_segments, horizontal_segments, pdf_scalers
+        )
 
     def _generate_columns_and_rows(self, table_idx, tk):
         # select elements which lie within table_bbox
         t_bbox = {}
         v_s, h_s = segments_in_bbox(
-            tk, self.vertical_segments, self.horizontal_segments)
-        t_bbox['horizontal'] = text_in_bbox(tk, self.horizontal_text)
-        t_bbox['vertical'] = text_in_bbox(tk, self.vertical_text)
+            tk, self.vertical_segments, self.horizontal_segments
+        )
+        t_bbox["horizontal"] = text_in_bbox(tk, self.horizontal_text)
+        t_bbox["vertical"] = text_in_bbox(tk, self.vertical_text)
 
-        t_bbox['horizontal'].sort(key=lambda x: (-x.y0, x.x0))
-        t_bbox['vertical'].sort(key=lambda x: (x.x0, -x.y0))
+        t_bbox["horizontal"].sort(key=lambda x: (-x.y0, x.x0))
+        t_bbox["vertical"].sort(key=lambda x: (x.x0, -x.y0))
 
         self.t_bbox = t_bbox
 
@@ -267,23 +332,19 @@ class Lattice(BaseParser):
         cols.extend([tk[0], tk[2]])
         rows.extend([tk[1], tk[3]])
         # sort horizontal and vertical segments
-        cols = merge_close_lines(
-            sorted(cols), line_tol=self.line_tol)
-        rows = merge_close_lines(
-            sorted(rows, reverse=True), line_tol=self.line_tol)
+        cols = merge_close_lines(sorted(cols), line_tol=self.line_tol)
+        rows = merge_close_lines(sorted(rows, reverse=True), line_tol=self.line_tol)
         # make grid using x and y coord of shortlisted rows and cols
-        cols = [(cols[i], cols[i + 1])
-                for i in range(0, len(cols) - 1)]
-        rows = [(rows[i], rows[i + 1])
-                for i in range(0, len(rows) - 1)]
+        cols = [(cols[i], cols[i + 1]) for i in range(0, len(cols) - 1)]
+        rows = [(rows[i], rows[i + 1]) for i in range(0, len(rows) - 1)]
 
         return cols, rows, v_s, h_s
 
     def _generate_table(self, table_idx, cols, rows, **kwargs):
-        v_s = kwargs.get('v_s')
-        h_s = kwargs.get('h_s')
+        v_s = kwargs.get("v_s")
+        h_s = kwargs.get("h_s")
         if v_s is None or h_s is None:
-            raise ValueError('No segments found on {}'.format(self.rootname))
+            raise ValueError("No segments found on {}".format(self.rootname))
 
         table = Table(cols, rows)
         # set table edges to True using ver+hor lines
@@ -296,14 +357,21 @@ class Lattice(BaseParser):
         pos_errors = []
         # TODO: have a single list in place of two directional ones?
         # sorted on x-coordinate based on reading order i.e. LTR or RTL
-        for direction in ['vertical', 'horizontal']:
+        for direction in ["vertical", "horizontal"]:
             for t in self.t_bbox[direction]:
                 indices, error = get_table_index(
-                    table, t, direction, split_text=self.split_text,
-                    flag_size=self.flag_size, strip_text=self.strip_text)
+                    table,
+                    t,
+                    direction,
+                    split_text=self.split_text,
+                    flag_size=self.flag_size,
+                    strip_text=self.strip_text,
+                )
                 if indices[:2] != (-1, -1):
                     pos_errors.append(error)
-                    indices = Lattice._reduce_index(table, indices, shift_text=self.shift_text)
+                    indices = Lattice._reduce_index(
+                        table, indices, shift_text=self.shift_text
+                    )
                     for r_idx, c_idx, text in indices:
                         table.cells[r_idx][c_idx].text = text
         accuracy = compute_accuracy([[100, pos_errors]])
@@ -316,11 +384,11 @@ class Lattice(BaseParser):
         table.shape = table.df.shape
 
         whitespace = compute_whitespace(data)
-        table.flavor = 'lattice'
+        table.flavor = "lattice"
         table.accuracy = accuracy
         table.whitespace = whitespace
         table.order = table_idx + 1
-        table.page = int(os.path.basename(self.rootname).replace('page-', ''))
+        table.page = int(os.path.basename(self.rootname).replace("page-", ""))
 
         # for plotting
         _text = []
@@ -336,24 +404,29 @@ class Lattice(BaseParser):
     def extract_tables(self, filename, suppress_stdout=False, layout_kwargs={}):
         self._generate_layout(filename, layout_kwargs)
         if not suppress_stdout:
-            logger.info('Processing {}'.format(os.path.basename(self.rootname)))
+            logger.info("Processing {}".format(os.path.basename(self.rootname)))
 
         if not self.horizontal_text:
             if self.images:
-                warnings.warn('{} is image-based, camelot only works on'
-                              ' text-based pages.'.format(os.path.basename(self.rootname)))
+                warnings.warn(
+                    "{} is image-based, camelot only works on"
+                    " text-based pages.".format(os.path.basename(self.rootname))
+                )
             else:
-                warnings.warn('No tables found on {}'.format(
-                    os.path.basename(self.rootname)))
+                warnings.warn(
+                    "No tables found on {}".format(os.path.basename(self.rootname))
+                )
             return []
 
-        self._generate_image()
+        self.backend.convert(self.filename, self.imagename)
+
         self._generate_table_bbox()
 
         _tables = []
         # sort tables based on y-coord
-        for table_idx, tk in enumerate(sorted(
-                self.table_bbox.keys(), key=lambda x: x[1], reverse=True)):
+        for table_idx, tk in enumerate(
+            sorted(self.table_bbox.keys(), key=lambda x: x[1], reverse=True)
+        ):
             cols, rows, v_s, h_s = self._generate_columns_and_rows(table_idx, tk)
             table = self._generate_table(table_idx, cols, rows, v_s=v_s, h_s=h_s)
             table._bbox = tk

camelot/parsers/stream.py

@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 
-from __future__ import division
 import os
 import logging
 import warnings
@@ -10,11 +9,10 @@ import pandas as pd
 
 from .base import BaseParser
 from ..core import TextEdges, Table
-from ..utils import (text_in_bbox, get_table_index, compute_accuracy,
-                     compute_whitespace)
+from ..utils import text_in_bbox, get_table_index, compute_accuracy, compute_whitespace
 
 
-logger = logging.getLogger('camelot')
+logger = logging.getLogger("camelot")
 
 
 class Stream(BaseParser):
@@ -55,9 +53,20 @@ class Stream(BaseParser):
         to generate columns.
 
     """
-    def __init__(self, table_regions=None, table_areas=None, columns=None, split_text=False,
-                 flag_size=False, strip_text='', edge_tol=50, row_tol=2,
-                 column_tol=0, **kwargs):
+
+    def __init__(
+        self,
+        table_regions=None,
+        table_areas=None,
+        columns=None,
+        split_text=False,
+        flag_size=False,
+        strip_text="",
+        edge_tol=50,
+        row_tol=2,
+        column_tol=0,
+        **kwargs,
+    ):
         self.table_regions = table_regions
         self.table_areas = table_areas
         self.columns = columns
@@ -112,6 +121,7 @@ class Stream(BaseParser):
         row_y = 0
         rows = []
         temp = []
+
         for t in text:
             # is checking for upright necessary?
             # if t.get_text().strip() and all([obj.upright for obj in t._objs if
@@ -122,7 +132,9 @@ class Stream(BaseParser):
                     temp = []
                     row_y = t.y0
                 temp.append(t)
+
         rows.append(sorted(temp, key=lambda t: t.x0))
+        if len(rows) > 1:
             __ = rows.pop(0)  # TODO: hacky
         return rows
 
@@ -150,8 +162,9 @@ class Stream(BaseParser):
             else:
                 lower = merged[-1]
                 if column_tol >= 0:
-                    if (higher[0] <= lower[1] or
-                            np.isclose(higher[0], lower[1], atol=column_tol)):
+                    if higher[0] <= lower[1] or np.isclose(
+                        higher[0], lower[1], atol=column_tol
+                    ):
                         upper_bound = max(lower[1], higher[1])
                         lower_bound = min(lower[0], higher[0])
                         merged[-1] = (lower_bound, upper_bound)
@@ -186,13 +199,14 @@ class Stream(BaseParser):
             List of continuous row y-coordinate tuples.
 
         """
-        row_mids = [sum([(t.y0 + t.y1) / 2 for t in r]) / len(r)
-                    if len(r) > 0 else 0 for r in rows_grouped]
+        row_mids = [
+            sum([(t.y0 + t.y1) / 2 for t in r]) / len(r) if len(r) > 0 else 0
+            for r in rows_grouped
+        ]
         rows = [(row_mids[i] + row_mids[i - 1]) / 2 for i in range(1, len(row_mids))]
         rows.insert(0, text_y_max)
         rows.append(text_y_min)
-        rows = [(rows[i], rows[i + 1])
-                for i in range(0, len(rows) - 1)]
+        rows = [(rows[i], rows[i + 1]) for i in range(0, len(rows) - 1)]
         return rows
 
     @staticmethod
@@ -217,8 +231,9 @@ class Stream(BaseParser):
         if text:
             text = Stream._group_rows(text, row_tol=row_tol)
             elements = [len(r) for r in text]
-            new_cols = [(t.x0, t.x1)
-                        for r in text if len(r) == max(elements) for t in r]
+            new_cols = [
+                (t.x0, t.x1) for r in text if len(r) == max(elements) for t in r
+            ]
             cols.extend(Stream._merge_columns(sorted(new_cols)))
         return cols
 
@@ -243,15 +258,13 @@ class Stream(BaseParser):
         cols = [(cols[i][0] + cols[i - 1][1]) / 2 for i in range(1, len(cols))]
         cols.insert(0, text_x_min)
         cols.append(text_x_max)
-        cols = [(cols[i], cols[i + 1])
-                for i in range(0, len(cols) - 1)]
+        cols = [(cols[i], cols[i + 1]) for i in range(0, len(cols) - 1)]
         return cols
 
     def _validate_columns(self):
         if self.table_areas is not None and self.columns is not None:
             if len(self.table_areas) != len(self.columns):
-                raise ValueError("Length of table_areas and columns"
-                                 " should be equal")
+                raise ValueError("Length of table_areas and columns" " should be equal")
 
     def _nurminen_table_detection(self, textlines):
         """A general implementation of the table detection algorithm
@@ -286,7 +299,11 @@ class Stream(BaseParser):
                 # filter horizontal text
                 hor_text = []
                 for region in self.table_regions:
-                    x1, y1, x2, y2 = region
+                    x1, y1, x2, y2 = region.split(",")
+                    x1 = float(x1)
+                    y1 = float(y1)
+                    x2 = float(x2)
+                    y2 = float(y2)
                     region_text = text_in_bbox((x1, y2, x2, y1), self.horizontal_text)
                     hor_text.extend(region_text)
             # find tables based on nurminen's detection algorithm
@@ -305,16 +322,16 @@ class Stream(BaseParser):
     def _generate_columns_and_rows(self, table_idx, tk):
         # select elements which lie within table_bbox
         t_bbox = {}
-        t_bbox['horizontal'] = text_in_bbox(tk, self.horizontal_text)
-        t_bbox['vertical'] = text_in_bbox(tk, self.vertical_text)
+        t_bbox["horizontal"] = text_in_bbox(tk, self.horizontal_text)
+        t_bbox["vertical"] = text_in_bbox(tk, self.vertical_text)
 
-        t_bbox['horizontal'].sort(key=lambda x: (-x.y0, x.x0))
-        t_bbox['vertical'].sort(key=lambda x: (x.x0, -x.y0))
+        t_bbox["horizontal"].sort(key=lambda x: (-x.y0, x.x0))
+        t_bbox["vertical"].sort(key=lambda x: (x.x0, -x.y0))
 
         self.t_bbox = t_bbox
 
         text_x_min, text_y_min, text_x_max, text_y_max = self._text_bbox(self.t_bbox)
-        rows_grouped = self._group_rows(self.t_bbox['horizontal'], row_tol=self.row_tol)
+        rows_grouped = self._group_rows(self.t_bbox["horizontal"], row_tol=self.row_tol)
         rows = self._join_rows(rows_grouped, text_y_max, text_y_min)
         elements = [len(r) for r in rows_grouped]
 
@@ -323,7 +340,7 @@ class Stream(BaseParser):
             # take (0, pdf_width) by default
             # similar to else condition
             # len can't be 1
-            cols = self.columns[table_idx].split(',')
+            cols = self.columns[table_idx].split(",")
             cols = [float(c) for c in cols]
             cols.insert(0, text_x_min)
             cols.append(text_x_max)
@@ -331,6 +348,9 @@ class Stream(BaseParser):
         else:
             # calculate mode of the list of number of elements in
             # each row to guess the number of columns
+            if not len(elements):
+                cols = [(text_x_min, text_x_max)]
+            else:
                 ncols = max(set(elements), key=elements.count)
                 if ncols == 1:
                     # if mode is 1, the page usually contains not tables
@@ -342,20 +362,29 @@ class Stream(BaseParser):
                     if len(elements):
                         ncols = max(set(elements), key=elements.count)
                     else:
-                    warnings.warn("No tables found in table area {}".format(
-                        table_idx + 1))
-            cols = [(t.x0, t.x1) for r in rows_grouped if len(r) == ncols for t in r]
+                        warnings.warn(f"No tables found in table area {table_idx + 1}")
+                cols = [
+                    (t.x0, t.x1) for r in rows_grouped if len(r) == ncols for t in r
+                ]
                 cols = self._merge_columns(sorted(cols), column_tol=self.column_tol)
                 inner_text = []
                 for i in range(1, len(cols)):
                     left = cols[i - 1][1]
                     right = cols[i][0]
-                inner_text.extend([t for direction in self.t_bbox
+                    inner_text.extend(
+                        [
+                            t
+                            for direction in self.t_bbox
                             for t in self.t_bbox[direction]
-                                     if t.x0 > left and t.x1 < right])
-            outer_text = [t for direction in self.t_bbox
+                            if t.x0 > left and t.x1 < right
+                        ]
+                    )
+                outer_text = [
+                    t
+                    for direction in self.t_bbox
                     for t in self.t_bbox[direction]
-                            if t.x0 > cols[-1][1] or t.x1 < cols[0][0]]
+                    if t.x0 > cols[-1][1] or t.x1 < cols[0][0]
+                ]
                 inner_text.extend(outer_text)
                 cols = self._add_columns(cols, inner_text, self.row_tol)
                 cols = self._join_columns(cols, text_x_min, text_x_max)
@@ -369,11 +398,16 @@ class Stream(BaseParser):
         pos_errors = []
         # TODO: have a single list in place of two directional ones?
         # sorted on x-coordinate based on reading order i.e. LTR or RTL
-        for direction in ['vertical', 'horizontal']:
+        for direction in ["vertical", "horizontal"]:
             for t in self.t_bbox[direction]:
                 indices, error = get_table_index(
-                    table, t, direction, split_text=self.split_text,
-                    flag_size=self.flag_size, strip_text=self.strip_text)
+                    table,
+                    t,
+                    direction,
+                    split_text=self.split_text,
+                    flag_size=self.flag_size,
+                    strip_text=self.strip_text,
+                )
                 if indices[:2] != (-1, -1):
                     pos_errors.append(error)
                     for r_idx, c_idx, text in indices:
@@ -385,11 +419,11 @@ class Stream(BaseParser):
         table.shape = table.df.shape
 
         whitespace = compute_whitespace(data)
-        table.flavor = 'stream'
+        table.flavor = "stream"
         table.accuracy = accuracy
         table.whitespace = whitespace
         table.order = table_idx + 1
-        table.page = int(os.path.basename(self.rootname).replace('page-', ''))
+        table.page = int(os.path.basename(self.rootname).replace("page-", ""))
 
         # for plotting
         _text = []
@@ -404,24 +438,28 @@ class Stream(BaseParser):
 
     def extract_tables(self, filename, suppress_stdout=False, layout_kwargs={}):
         self._generate_layout(filename, layout_kwargs)
+        base_filename = os.path.basename(self.rootname)
+
         if not suppress_stdout:
-            logger.info('Processing {}'.format(os.path.basename(self.rootname)))
+            logger.info(f"Processing {base_filename}")
 
         if not self.horizontal_text:
             if self.images:
-                warnings.warn('{} is image-based, camelot only works on'
-                              ' text-based pages.'.format(os.path.basename(self.rootname)))
+                warnings.warn(
+                    f"{base_filename} is image-based, camelot only works on"
+                    " text-based pages."
+                )
             else:
-                warnings.warn('No tables found on {}'.format(
-                    os.path.basename(self.rootname)))
+                warnings.warn(f"No tables found on {base_filename}")
             return []
 
         self._generate_table_bbox()
 
         _tables = []
         # sort tables based on y-coord
-        for table_idx, tk in enumerate(sorted(
-                self.table_bbox.keys(), key=lambda x: x[1], reverse=True)):
+        for table_idx, tk in enumerate(
+            sorted(self.table_bbox.keys(), key=lambda x: x[1], reverse=True)
+        ):
             cols, rows = self._generate_columns_and_rows(table_idx, tk)
             table = self._generate_table(table_idx, cols, rows)
             table._bbox = tk

camelot/plotting.py

@@ -10,7 +10,7 @@ else:
 
 
 class PlotMethods(object):
-    def __call__(self, table, kind='text', filename=None):
+    def __call__(self, table, kind="text", filename=None):
         """Plot elements found on PDF page based on kind
         specified, useful for debugging and playing with different
         parameters to get the best output.
@@ -31,17 +31,21 @@ class PlotMethods(object):
 
         """
         if not _HAS_MPL:
-            raise ImportError('matplotlib is required for plotting.')
+            raise ImportError("matplotlib is required for plotting.")
 
-        if table.flavor == 'lattice' and kind in ['textedge']:
-            raise NotImplementedError("Lattice flavor does not support kind='{}'".format(
-                                      kind))
-        elif table.flavor == 'stream' and kind in ['joint', 'line']:
-            raise NotImplementedError("Stream flavor does not support kind='{}'".format(
-                                      kind))
+        if table.flavor == "lattice" and kind in ["textedge"]:
+            raise NotImplementedError(f"Lattice flavor does not support kind='{kind}'")
+        elif table.flavor == "stream" and kind in ["joint", "line"]:
+            raise NotImplementedError(f"Stream flavor does not support kind='{kind}'")
 
         plot_method = getattr(self, kind)
-        return plot_method(table)
+        fig = plot_method(table)
+
+        if filename is not None:
+            fig.savefig(filename)
+            return None
+
+        return fig
 
     def text(self, table):
         """Generates a plot for all text elements present
@@ -57,18 +61,12 @@ class PlotMethods(object):
 
         """
         fig = plt.figure()
-        ax = fig.add_subplot(111, aspect='equal')
+        ax = fig.add_subplot(111, aspect="equal")
         xs, ys = [], []
         for t in table._text:
             xs.extend([t[0], t[2]])
             ys.extend([t[1], t[3]])
-            ax.add_patch(
-                patches.Rectangle(
-                    (t[0], t[1]),
-                    t[2] - t[0],
-                    t[3] - t[1]
-                )
-            )
+            ax.add_patch(patches.Rectangle((t[0], t[1]), t[2] - t[0], t[3] - t[1]))
         ax.set_xlim(min(xs) - 10, max(xs) + 10)
         ax.set_ylim(min(ys) - 10, max(ys) + 10)
         return fig
@@ -87,21 +85,17 @@ class PlotMethods(object):
 
         """
         fig = plt.figure()
-        ax = fig.add_subplot(111, aspect='equal')
+        ax = fig.add_subplot(111, aspect="equal")
         for row in table.cells:
             for cell in row:
                 if cell.left:
-                    ax.plot([cell.lb[0], cell.lt[0]],
-                            [cell.lb[1], cell.lt[1]])
+                    ax.plot([cell.lb[0], cell.lt[0]], [cell.lb[1], cell.lt[1]])
                 if cell.right:
-                    ax.plot([cell.rb[0], cell.rt[0]],
-                            [cell.rb[1], cell.rt[1]])
+                    ax.plot([cell.rb[0], cell.rt[0]], [cell.rb[1], cell.rt[1]])
                 if cell.top:
-                    ax.plot([cell.lt[0], cell.rt[0]],
-                            [cell.lt[1], cell.rt[1]])
+                    ax.plot([cell.lt[0], cell.rt[0]], [cell.lt[1], cell.rt[1]])
                 if cell.bottom:
-                    ax.plot([cell.lb[0], cell.rb[0]],
-                            [cell.lb[1], cell.rb[1]])
+                    ax.plot([cell.lb[0], cell.rb[0]], [cell.lb[1], cell.rb[1]])
         return fig
 
     def contour(self, table):
@@ -124,7 +118,7 @@ class PlotMethods(object):
             img, table_bbox = (None, {table._bbox: None})
             _FOR_LATTICE = False
         fig = plt.figure()
-        ax = fig.add_subplot(111, aspect='equal')
+        ax = fig.add_subplot(111, aspect="equal")
 
         xs, ys = [], []
         if not _FOR_LATTICE:
@@ -133,21 +127,14 @@ class PlotMethods(object):
                 ys.extend([t[1], t[3]])
                 ax.add_patch(
                     patches.Rectangle(
-                        (t[0], t[1]),
-                        t[2] - t[0],
-                        t[3] - t[1],
-                        color='blue'
+                        (t[0], t[1]), t[2] - t[0], t[3] - t[1], color="blue"
                     )
                 )
 
         for t in table_bbox.keys():
             ax.add_patch(
                 patches.Rectangle(
-                    (t[0], t[1]),
-                    t[2] - t[0],
-                    t[3] - t[1],
-                    fill=False,
-                    color='red'
+                    (t[0], t[1]), t[2] - t[0], t[3] - t[1], fill=False, color="red"
                 )
             )
             if not _FOR_LATTICE:
@@ -173,25 +160,19 @@ class PlotMethods(object):
 
         """
         fig = plt.figure()
-        ax = fig.add_subplot(111, aspect='equal')
+        ax = fig.add_subplot(111, aspect="equal")
         xs, ys = [], []
         for t in table._text:
             xs.extend([t[0], t[2]])
             ys.extend([t[1], t[3]])
             ax.add_patch(
-                patches.Rectangle(
-                    (t[0], t[1]),
-                    t[2] - t[0],
-                    t[3] - t[1],
-                    color='blue'
-                )
+                patches.Rectangle((t[0], t[1]), t[2] - t[0], t[3] - t[1], color="blue")
             )
         ax.set_xlim(min(xs) - 10, max(xs) + 10)
         ax.set_ylim(min(ys) - 10, max(ys) + 10)
 
         for te in table._textedges:
-            ax.plot([te.x, te.x],
-                    [te.y0, te.y1])
+            ax.plot([te.x, te.x], [te.y0, te.y1])
 
         return fig
 
@@ -210,14 +191,14 @@ class PlotMethods(object):
         """
         img, table_bbox = table._image
         fig = plt.figure()
-        ax = fig.add_subplot(111, aspect='equal')
+        ax = fig.add_subplot(111, aspect="equal")
         x_coord = []
         y_coord = []
         for k in table_bbox.keys():
             for coord in table_bbox[k]:
                 x_coord.append(coord[0])
                 y_coord.append(coord[1])
-        ax.plot(x_coord, y_coord, 'ro')
+        ax.plot(x_coord, y_coord, "ro")
         ax.imshow(img)
         return fig
 
@@ -235,7 +216,7 @@ class PlotMethods(object):
 
         """
         fig = plt.figure()
-        ax = fig.add_subplot(111, aspect='equal')
+        ax = fig.add_subplot(111, aspect="equal")
         vertical, horizontal = table._segments
         for v in vertical:
             ax.plot([v[0], v[2]], [v[1], v[3]])

camelot/utils.py

@@ -1,8 +1,7 @@
 # -*- coding: utf-8 -*-
-from __future__ import division
 
 import os
-import sys
+import re
 import random
 import shutil
 import string
@@ -19,23 +18,22 @@ from pdfminer.pdfpage import PDFTextExtractionNotAllowed
 from pdfminer.pdfinterp import PDFResourceManager
 from pdfminer.pdfinterp import PDFPageInterpreter
 from pdfminer.converter import PDFPageAggregator
-from pdfminer.layout import (LAParams, LTAnno, LTChar, LTTextLineHorizontal,
-                             LTTextLineVertical, LTImage)
+from pdfminer.layout import (
+    LAParams,
+    LTAnno,
+    LTChar,
+    LTTextLineHorizontal,
+    LTTextLineVertical,
+    LTImage,
+)
 
-
-PY3 = sys.version_info[0] >= 3
-if PY3:
-    from urllib.request import urlopen
-    from urllib.parse import urlparse as parse_url
-    from urllib.parse import uses_relative, uses_netloc, uses_params
-else:
-    from urllib2 import urlopen
-    from urlparse import urlparse as parse_url
-    from urlparse import uses_relative, uses_netloc, uses_params
+from urllib.request import Request, urlopen
+from urllib.parse import urlparse as parse_url
+from urllib.parse import uses_relative, uses_netloc, uses_params
 
 
 _VALID_URLS = set(uses_relative + uses_netloc + uses_params)
-_VALID_URLS.discard('')
+_VALID_URLS.discard("")
 
 
 # https://github.com/pandas-dev/pandas/blob/master/pandas/io/common.py
@@ -59,9 +57,11 @@ def is_url(url):
 
 
 def random_string(length):
-    ret = ''
+    ret = ""
     while length:
-        ret += random.choice(string.digits + string.ascii_lowercase + string.ascii_uppercase)
+        ret += random.choice(
+            string.digits + string.ascii_lowercase + string.ascii_uppercase
+        )
         length -= 1
     return ret
 
@@ -79,14 +79,13 @@ def download_url(url):
         Temporary filepath.
 
     """
-    filename = '{}.pdf'.format(random_string(6))
-    with tempfile.NamedTemporaryFile('wb', delete=False) as f:
-        obj = urlopen(url)
-        if PY3:
+    filename = f"{random_string(6)}.pdf"
+    with tempfile.NamedTemporaryFile("wb", delete=False) as f:
+        headers = {"User-Agent": "Mozilla/5.0"}
+        request = Request(url, None, headers)
+        obj = urlopen(request)
         content_type = obj.info().get_content_type()
-        else:
-            content_type = obj.info().getheader('Content-Type')
-        if content_type != 'application/pdf':
+        if content_type != "application/pdf":
             raise NotImplementedError("File format not supported")
         f.write(obj.read())
     filepath = os.path.join(os.path.dirname(f.name), filename)
@@ -94,39 +93,37 @@ def download_url(url):
     return filepath
 
 
-stream_kwargs = [
-    'columns',
-    'row_tol',
-    'column_tol'
-]
+stream_kwargs = ["columns", "edge_tol", "row_tol", "column_tol"]
 lattice_kwargs = [
-    'process_background',
-    'line_scale',
-    'copy_text',
-    'shift_text',
-    'line_tol',
-    'joint_tol',
-    'threshold_blocksize',
-    'threshold_constant',
-    'iterations'
+    "process_background",
+    "line_scale",
+    "copy_text",
+    "shift_text",
+    "line_tol",
+    "joint_tol",
+    "threshold_blocksize",
+    "threshold_constant",
+    "iterations",
+    "resolution",
 ]
 
 
-def validate_input(kwargs, flavor='lattice'):
+def validate_input(kwargs, flavor="lattice"):
     def check_intersection(parser_kwargs, input_kwargs):
         isec = set(parser_kwargs).intersection(set(input_kwargs.keys()))
         if isec:
-            raise ValueError("{} cannot be used with flavor='{}'".format(
-                             ",".join(sorted(isec)), flavor))
+            raise ValueError(
+                f"{','.join(sorted(isec))} cannot be used with flavor='{flavor}'"
+            )
 
-    if flavor == 'lattice':
+    if flavor == "lattice":
         check_intersection(stream_kwargs, kwargs)
     else:
         check_intersection(lattice_kwargs, kwargs)
 
 
-def remove_extra(kwargs, flavor='lattice'):
-    if flavor == 'lattice':
+def remove_extra(kwargs, flavor="lattice"):
+    if flavor == "lattice":
         for key in kwargs.keys():
             if key in stream_kwargs:
                 kwargs.pop(key)
@@ -256,15 +253,19 @@ def scale_image(tables, v_segments, h_segments, factors):
     v_segments_new = []
     for v in v_segments:
         x1, x2 = scale(v[0], scaling_factor_x), scale(v[2], scaling_factor_x)
-        y1, y2 = scale(abs(translate(-img_y, v[1])), scaling_factor_y), scale(
-            abs(translate(-img_y, v[3])), scaling_factor_y)
+        y1, y2 = (
+            scale(abs(translate(-img_y, v[1])), scaling_factor_y),
+            scale(abs(translate(-img_y, v[3])), scaling_factor_y),
+        )
         v_segments_new.append((x1, y1, x2, y2))
 
     h_segments_new = []
     for h in h_segments:
         x1, x2 = scale(h[0], scaling_factor_x), scale(h[2], scaling_factor_x)
-        y1, y2 = scale(abs(translate(-img_y, h[1])), scaling_factor_y), scale(
-            abs(translate(-img_y, h[3])), scaling_factor_y)
+        y1, y2 = (
+            scale(abs(translate(-img_y, h[1])), scaling_factor_y),
+            scale(abs(translate(-img_y, h[3])), scaling_factor_y),
+        )
         h_segments_new.append((x1, y1, x2, y2))
 
     return tables_new, v_segments_new, h_segments_new
@@ -291,13 +292,13 @@ def get_rotation(chars, horizontal_text, vertical_text):
         rotated 90 degree clockwise.
 
     """
-    rotation = ''
+    rotation = ""
     hlen = len([t for t in horizontal_text if t.get_text().strip()])
     vlen = len([t for t in vertical_text if t.get_text().strip()])
     if hlen < vlen:
         clockwise = sum(t.matrix[1] < 0 and t.matrix[2] > 0 for t in chars)
         anticlockwise = sum(t.matrix[1] > 0 and t.matrix[2] < 0 for t in chars)
-        rotation = 'anticlockwise' if clockwise < anticlockwise else 'clockwise'
+        rotation = "anticlockwise" if clockwise < anticlockwise else "clockwise"
     return rotation
 
 
@@ -325,10 +326,16 @@ def segments_in_bbox(bbox, v_segments, h_segments):
     """
     lb = (bbox[0], bbox[1])
     rt = (bbox[2], bbox[3])
-    v_s = [v for v in v_segments if v[1] > lb[1] - 2 and
-           v[3] < rt[1] + 2 and lb[0] - 2 <= v[0] <= rt[0] + 2]
-    h_s = [h for h in h_segments if h[0] > lb[0] - 2 and
-           h[2] < rt[0] + 2 and lb[1] - 2 <= h[1] <= rt[1] + 2]
+    v_s = [
+        v
+        for v in v_segments
+        if v[1] > lb[1] - 2 and v[3] < rt[1] + 2 and lb[0] - 2 <= v[0] <= rt[0] + 2
+    ]
+    h_s = [
+        h
+        for h in h_segments
+        if h[0] > lb[0] - 2 and h[2] < rt[0] + 2 and lb[1] - 2 <= h[1] <= rt[1] + 2
+    ]
     return v_s, h_s
 
 
@@ -346,15 +353,108 @@ def text_in_bbox(bbox, text):
     Returns
     -------
     t_bbox : list
-        List of PDFMiner text objects that lie inside table.
+        List of PDFMiner text objects that lie inside table, discarding the overlapping ones
 
     """
     lb = (bbox[0], bbox[1])
     rt = (bbox[2], bbox[3])
-    t_bbox = [t for t in text if lb[0] - 2 <= (t.x0 + t.x1) / 2.0
-              <= rt[0] + 2 and lb[1] - 2 <= (t.y0 + t.y1) / 2.0
-              <= rt[1] + 2]
-    return t_bbox
+    t_bbox = [
+        t
+        for t in text
+        if lb[0] - 2 <= (t.x0 + t.x1) / 2.0 <= rt[0] + 2
+        and lb[1] - 2 <= (t.y0 + t.y1) / 2.0 <= rt[1] + 2
+    ]
+
+    # Avoid duplicate text by discarding overlapping boxes
+    rest = {t for t in t_bbox}
+    for ba in t_bbox:
+        for bb in rest.copy():
+            if ba == bb:
+                continue
+            if bbox_intersect(ba, bb):
+                # if the intersection is larger than 80% of ba's size, we keep the longest
+                if (bbox_intersection_area(ba, bb) / bbox_area(ba)) > 0.8:
+                    if bbox_longer(bb, ba):
+                        rest.discard(ba)
+    unique_boxes = list(rest)
+
+    return unique_boxes
+
+
+def bbox_intersection_area(ba, bb) -> float:
+    """Returns area of the intersection of the bounding boxes of two PDFMiner objects.
+
+    Parameters
+    ----------
+    ba : PDFMiner text object
+    bb : PDFMiner text object
+
+    Returns
+    -------
+    intersection_area : float
+        Area of the intersection of the bounding boxes of both objects
+
+    """
+    x_left = max(ba.x0, bb.x0)
+    y_top = min(ba.y1, bb.y1)
+    x_right = min(ba.x1, bb.x1)
+    y_bottom = max(ba.y0, bb.y0)
+
+    if x_right < x_left or y_bottom > y_top:
+        return 0.0
+
+    intersection_area = (x_right - x_left) * (y_top - y_bottom)
+    return intersection_area
+
+
+def bbox_area(bb) -> float:
+    """Returns area of the bounding box of a PDFMiner object.
+
+    Parameters
+    ----------
+    bb : PDFMiner text object
+
+    Returns
+    -------
+    area : float
+        Area of the bounding box of the object
+
+    """
+    return (bb.x1 - bb.x0) * (bb.y1 - bb.y0)
+
+
+def bbox_intersect(ba, bb) -> bool:
+    """Returns True if the bounding boxes of two PDFMiner objects intersect.
+
+    Parameters
+    ----------
+    ba : PDFMiner text object
+    bb : PDFMiner text object
+
+    Returns
+    -------
+    overlaps : bool
+        True if the bounding boxes intersect
+
+    """
+    return ba.x1 >= bb.x0 and bb.x1 >= ba.x0 and ba.y1 >= bb.y0 and bb.y1 >= ba.y0
+
+
+def bbox_longer(ba, bb) -> bool:
+    """Returns True if the bounding box of the first PDFMiner object is longer or equal to the second.
+
+    Parameters
+    ----------
+    ba : PDFMiner text object
+    bb : PDFMiner text object
+
+    Returns
+    -------
+    longer : bool
+        True if the bounding box of the first object is longer or equal
+
+    """
+    return (ba.x1 - ba.x0) >= (bb.x1 - bb.x0)
 
 
 def merge_close_lines(ar, line_tol=2):
@@ -385,12 +485,33 @@ def merge_close_lines(ar, line_tol=2):
     return ret
 
 
+def text_strip(text, strip=""):
+    """Strips any characters in `strip` that are present in `text`.
+    Parameters
+    ----------
+    text : str
+        Text to process and strip.
+    strip : str, optional (default: '')
+        Characters that should be stripped from `text`.
+    Returns
+    -------
+    stripped : str
+    """
+    if not strip:
+        return text
+
+    stripped = re.sub(
+        fr"[{''.join(map(re.escape, strip))}]", "", text, flags=re.UNICODE
+    )
+    return stripped
+
+
 # TODO: combine the following functions into a TextProcessor class which
 # applies corresponding transformations sequentially
 # (inspired from sklearn.pipeline.Pipeline)
 
 
-def flag_font_size(textline, direction, strip_text=''):
+def flag_font_size(textline, direction, strip_text=""):
     """Flags super/subscripts in text by enclosing them with <s></s>.
     May give false positives.
 
@@ -409,10 +530,18 @@ def flag_font_size(textline, direction, strip_text=''):
     fstring : string
 
     """
-    if direction == 'horizontal':
-        d = [(t.get_text(), np.round(t.height, decimals=6)) for t in textline if not isinstance(t, LTAnno)]
-    elif direction == 'vertical':
-        d = [(t.get_text(), np.round(t.width, decimals=6)) for t in textline if not isinstance(t, LTAnno)]
+    if direction == "horizontal":
+        d = [
+            (t.get_text(), np.round(t.height, decimals=6))
+            for t in textline
+            if not isinstance(t, LTAnno)
+        ]
+    elif direction == "vertical":
+        d = [
+            (t.get_text(), np.round(t.width, decimals=6))
+            for t in textline
+            if not isinstance(t, LTAnno)
+        ]
     l = [np.round(size, decimals=6) for text, size in d]
     if len(set(l)) > 1:
         flist = []
@@ -420,21 +549,21 @@ def flag_font_size(textline, direction, strip_text=''):
         for key, chars in groupby(d, itemgetter(1)):
             if key == min_size:
                 fchars = [t[0] for t in chars]
-                if ''.join(fchars).strip():
-                    fchars.insert(0, '<s>')
-                    fchars.append('</s>')
-                    flist.append(''.join(fchars))
+                if "".join(fchars).strip():
+                    fchars.insert(0, "<s>")
+                    fchars.append("</s>")
+                    flist.append("".join(fchars))
             else:
                 fchars = [t[0] for t in chars]
-                if ''.join(fchars).strip():
-                    flist.append(''.join(fchars))
-        fstring = ''.join(flist).strip(strip_text)
+                if "".join(fchars).strip():
+                    flist.append("".join(fchars))
+        fstring = "".join(flist)
     else:
-        fstring = ''.join([t.get_text() for t in textline]).strip(strip_text)
-    return fstring
+        fstring = "".join([t.get_text() for t in textline])
+    return text_strip(fstring, strip_text)
 
 
-def split_textline(table, textline, direction, flag_size=False, strip_text=''):
+def split_textline(table, textline, direction, flag_size=False, strip_text=""):
     """Splits PDFMiner LTTextLine into substrings if it spans across
     multiple rows/columns.
 
@@ -464,38 +593,70 @@ def split_textline(table, textline, direction, flag_size=False, strip_text=''):
     cut_text = []
     bbox = textline.bbox
     try:
-        if direction == 'horizontal' and not textline.is_empty():
-            x_overlap = [i for i, x in enumerate(table.cols) if x[0] <= bbox[2] and bbox[0] <= x[1]]
-            r_idx = [j for j, r in enumerate(table.rows) if r[1] <= (bbox[1] + bbox[3]) / 2 <= r[0]]
+        if direction == "horizontal" and not textline.is_empty():
+            x_overlap = [
+                i
+                for i, x in enumerate(table.cols)
+                if x[0] <= bbox[2] and bbox[0] <= x[1]
+            ]
+            r_idx = [
+                j
+                for j, r in enumerate(table.rows)
+                if r[1] <= (bbox[1] + bbox[3]) / 2 <= r[0]
+            ]
             r = r_idx[0]
-            x_cuts = [(c, table.cells[r][c].x2) for c in x_overlap if table.cells[r][c].right]
+            x_cuts = [
+                (c, table.cells[r][c].x2) for c in x_overlap if table.cells[r][c].right
+            ]
             if not x_cuts:
                 x_cuts = [(x_overlap[0], table.cells[r][-1].x2)]
             for obj in textline._objs:
                 row = table.rows[r]
                 for cut in x_cuts:
                     if isinstance(obj, LTChar):
-                        if (row[1] <= (obj.y0 + obj.y1) / 2 <= row[0] and
-                                (obj.x0 + obj.x1) / 2 <= cut[1]):
+                        if (
+                            row[1] <= (obj.y0 + obj.y1) / 2 <= row[0]
+                            and (obj.x0 + obj.x1) / 2 <= cut[1]
+                        ):
                             cut_text.append((r, cut[0], obj))
                             break
+                        else:
+                            # TODO: add test
+                            if cut == x_cuts[-1]:
+                                cut_text.append((r, cut[0] + 1, obj))
                     elif isinstance(obj, LTAnno):
                         cut_text.append((r, cut[0], obj))
-        elif direction == 'vertical' and not textline.is_empty():
-            y_overlap = [j for j, y in enumerate(table.rows) if y[1] <= bbox[3] and bbox[1] <= y[0]]
-            c_idx = [i for i, c in enumerate(table.cols) if c[0] <= (bbox[0] + bbox[2]) / 2 <= c[1]]
+        elif direction == "vertical" and not textline.is_empty():
+            y_overlap = [
+                j
+                for j, y in enumerate(table.rows)
+                if y[1] <= bbox[3] and bbox[1] <= y[0]
+            ]
+            c_idx = [
+                i
+                for i, c in enumerate(table.cols)
+                if c[0] <= (bbox[0] + bbox[2]) / 2 <= c[1]
+            ]
             c = c_idx[0]
-            y_cuts = [(r, table.cells[r][c].y1) for r in y_overlap if table.cells[r][c].bottom]
+            y_cuts = [
+                (r, table.cells[r][c].y1) for r in y_overlap if table.cells[r][c].bottom
+            ]
             if not y_cuts:
                 y_cuts = [(y_overlap[0], table.cells[-1][c].y1)]
             for obj in textline._objs:
                 col = table.cols[c]
                 for cut in y_cuts:
                     if isinstance(obj, LTChar):
-                        if (col[0] <= (obj.x0 + obj.x1) / 2 <= col[1] and
-                                (obj.y0 + obj.y1) / 2 >= cut[1]):
+                        if (
+                            col[0] <= (obj.x0 + obj.x1) / 2 <= col[1]
+                            and (obj.y0 + obj.y1) / 2 >= cut[1]
+                        ):
                             cut_text.append((cut[0], c, obj))
                             break
+                        else:
+                            # TODO: add test
+                            if cut == y_cuts[-1]:
+                                cut_text.append((cut[0] - 1, c, obj))
                     elif isinstance(obj, LTAnno):
                         cut_text.append((cut[0], c, obj))
     except IndexError:
@@ -503,15 +664,26 @@ def split_textline(table, textline, direction, flag_size=False, strip_text=''):
     grouped_chars = []
     for key, chars in groupby(cut_text, itemgetter(0, 1)):
         if flag_size:
-            grouped_chars.append((key[0], key[1],
-                flag_font_size([t[2] for t in chars], direction, strip_text=strip_text)))
+            grouped_chars.append(
+                (
+                    key[0],
+                    key[1],
+                    flag_font_size(
+                        [t[2] for t in chars], direction, strip_text=strip_text
+                    ),
+                )
+            )
         else:
             gchars = [t[2].get_text() for t in chars]
-            grouped_chars.append((key[0], key[1], ''.join(gchars).strip(strip_text)))
+            grouped_chars.append(
+                (key[0], key[1], text_strip("".join(gchars), strip_text))
+            )
     return grouped_chars
 
 
-def get_table_index(table, t, direction, split_text=False, flag_size=False, strip_text='',):
+def get_table_index(
+    table, t, direction, split_text=False, flag_size=False, strip_text=""
+):
     """Gets indices of the table cell where given text object lies by
     comparing their y and x-coordinates.
 
@@ -550,8 +722,9 @@ def get_table_index(table, t, direction, split_text=False, flag_size=False, stri
     """
     r_idx, c_idx = [-1] * 2
     for r in range(len(table.rows)):
-        if ((t.y0 + t.y1) / 2.0 < table.rows[r][0] and
-                (t.y0 + t.y1) / 2.0 > table.rows[r][1]):
+        if (t.y0 + t.y1) / 2.0 < table.rows[r][0] and (t.y0 + t.y1) / 2.0 > table.rows[
+            r
+        ][1]:
             lt_col_overlap = []
             for c in table.cols:
                 if c[0] <= t.x1 and c[1] >= t.x0:
@@ -561,11 +734,12 @@ def get_table_index(table, t, direction, split_text=False, flag_size=False, stri
                 else:
                     lt_col_overlap.append(-1)
             if len(list(filter(lambda x: x != -1, lt_col_overlap))) == 0:
-                text = t.get_text().strip('\n')
+                text = t.get_text().strip("\n")
                 text_range = (t.x0, t.x1)
                 col_range = (table.cols[0][0], table.cols[-1][1])
-                warnings.warn("{} {} does not lie in column range {}".format(
-                    text, text_range, col_range))
+                warnings.warn(
+                    f"{text} {text_range} does not lie in column range {col_range}"
+                )
             r_idx = r
             c_idx = lt_col_overlap.index(max(lt_col_overlap))
             break
@@ -586,12 +760,26 @@ def get_table_index(table, t, direction, split_text=False, flag_size=False, stri
     error = ((X * (y0_offset + y1_offset)) + (Y * (x0_offset + x1_offset))) / charea
 
     if split_text:
-        return split_textline(table, t, direction, flag_size=flag_size, strip_text=strip_text), error
+        return (
+            split_textline(
+                table, t, direction, flag_size=flag_size, strip_text=strip_text
+            ),
+            error,
+        )
     else:
         if flag_size:
-            return [(r_idx, c_idx, flag_font_size(t._objs, direction, strip_text=strip_text))], error
+            return (
+                [
+                    (
+                        r_idx,
+                        c_idx,
+                        flag_font_size(t._objs, direction, strip_text=strip_text),
+                    )
+                ],
+                error,
+            )
         else:
-            return [(r_idx, c_idx, t.get_text().strip(strip_text))], error
+            return [(r_idx, c_idx, text_strip(t.get_text(), strip_text))], error
 
 
 def compute_accuracy(error_weights):
@@ -642,25 +830,35 @@ def compute_whitespace(d):
     r_nempty_cells, c_nempty_cells = [], []
     for i in d:
         for j in i:
-            if j.strip() == '':
+            if j.strip() == "":
                 whitespace += 1
     whitespace = 100 * (whitespace / float(len(d) * len(d[0])))
     return whitespace
 
 
-def get_page_layout(filename, char_margin=1.0, line_margin=0.5, word_margin=0.1,
-                    detect_vertical=True, all_texts=True):
+def get_page_layout(
+    filename,
+    line_overlap=0.5,
+    char_margin=1.0,
+    line_margin=0.5,
+    word_margin=0.1,
+    boxes_flow=0.5,
+    detect_vertical=True,
+    all_texts=True,
+):
     """Returns a PDFMiner LTPage object and page dimension of a single
-    page pdf. See https://euske.github.io/pdfminer/ to get definitions
-    of kwargs.
+    page pdf. To get the definitions of kwargs, see
+    https://pdfminersix.rtfd.io/en/latest/reference/composable.html.
 
     Parameters
     ----------
     filename : string
         Path to pdf file.
+    line_overlap : float
     char_margin : float
     line_margin : float
     word_margin : float
+    boxes_flow : float
     detect_vertical : bool
     all_texts : bool
 
@@ -672,16 +870,22 @@ def get_page_layout(filename, char_margin=1.0, line_margin=0.5, word_margin=0.1,
         Dimension of pdf page in the form (width, height).
 
     """
-    with open(filename, 'rb') as f:
+    with open(filename, "rb") as f:
         parser = PDFParser(f)
         document = PDFDocument(parser)
         if not document.is_extractable:
-            raise PDFTextExtractionNotAllowed
-        laparams = LAParams(char_margin=char_margin,
+            raise PDFTextExtractionNotAllowed(
+                f"Text extraction is not allowed: {filename}"
+            )
+        laparams = LAParams(
+            line_overlap=line_overlap,
+            char_margin=char_margin,
             line_margin=line_margin,
             word_margin=word_margin,
+            boxes_flow=boxes_flow,
             detect_vertical=detect_vertical,
-                            all_texts=all_texts)
+            all_texts=all_texts,
+        )
         rsrcmgr = PDFResourceManager()
         device = PDFPageAggregator(rsrcmgr, laparams=laparams)
         interpreter = PDFPageInterpreter(rsrcmgr, device)
@@ -713,13 +917,13 @@ def get_text_objects(layout, ltype="char", t=None):
         List of PDFMiner text objects.
 
     """
-    if ltype == 'char':
+    if ltype == "char":
         LTObject = LTChar
-    elif ltype == 'image':
+    elif ltype == "image":
         LTObject = LTImage
-    elif ltype == 'horizontal_text':
+    elif ltype == "horizontal_text":
         LTObject = LTTextLineHorizontal
-    elif ltype == 'vertical_text':
+    elif ltype == "vertical_text":
         LTObject = LTTextLineVertical
     if t is None:
         t = []

docs/_templates/sidebarintro.html

@@ -4,13 +4,13 @@
   </a>
 </p>
 <p>
-<iframe src="https://ghbtns.com/github-btn.html?user=socialcopsdev&repo=camelot&type=watch&count=true&size=large"
+<iframe src="https://ghbtns.com/github-btn.html?user=camelot-dev&repo=camelot&type=watch&count=true&size=large"
   allowtransparency="true" frameborder="0" scrolling="0" width="200px" height="35px"></iframe>
 </p>
 
 <h3>Useful Links</h3>
 <ul>
-  <li><a href="https://github.com/socialcopsdev/camelot">Camelot @ GitHub</a></li>
+  <li><a href="https://github.com/camelot-dev/camelot">Camelot @ GitHub</a></li>
   <li><a href="https://pypi.org/project/camelot-py/">Camelot @ PyPI</a></li>
-  <li><a href="https://github.com/socialcopsdev/camelot/issues">Issue Tracker</a></li>
+  <li><a href="https://github.com/camelot-dev/camelot/issues">Issue Tracker</a></li>
 </ul>

docs/_templates/sidebarlogo.html

@@ -4,6 +4,6 @@
   </a>
 </p>
 <p>
-<iframe src="https://ghbtns.com/github-btn.html?user=socialcopsdev&repo=camelot&type=watch&count=true&size=large"
+<iframe src="https://ghbtns.com/github-btn.html?user=camelot-dev&repo=camelot&type=watch&count=true&size=large"
   allowtransparency="true" frameborder="0" scrolling="0" width="200px" height="35px"></iframe>
 </p>

docs/_themes/flask_theme_support.py

@@ -1,7 +1,19 @@
 # flasky pygments style based on tango style
 from pygments.style import Style
-from pygments.token import Keyword, Name, Comment, String, Error, \
-     Number, Operator, Generic, Whitespace, Punctuation, Other, Literal
+from pygments.token import (
+    Keyword,
+    Name,
+    Comment,
+    String,
+    Error,
+    Number,
+    Operator,
+    Generic,
+    Whitespace,
+    Punctuation,
+    Other,
+    Literal,
+)
 
 
 class FlaskyStyle(Style):
@@ -14,10 +26,8 @@ class FlaskyStyle(Style):
         Whitespace: "underline #f8f8f8",  # class: 'w'
         Error: "#a40000 border:#ef2929",  # class: 'err'
         Other: "#000000",  # class 'x'
-
         Comment: "italic #8f5902",  # class: 'c'
         Comment.Preproc: "noitalic",  # class: 'cp'
-
         Keyword: "bold #004461",  # class: 'k'
         Keyword.Constant: "bold #004461",  # class: 'kc'
         Keyword.Declaration: "bold #004461",  # class: 'kd'
@@ -25,12 +35,9 @@ class FlaskyStyle(Style):
         Keyword.Pseudo: "bold #004461",  # class: 'kp'
         Keyword.Reserved: "bold #004461",  # class: 'kr'
         Keyword.Type: "bold #004461",  # class: 'kt'
-
         Operator: "#582800",  # class: 'o'
         Operator.Word: "bold #004461",  # class: 'ow' - like keywords
-
         Punctuation: "bold #000000",  # class: 'p'
-
         # because special names such as Name.Class, Name.Function, etc.
         # are not recognized as such later in the parsing, we choose them
         # to look the same as ordinary variables.
@@ -53,12 +60,9 @@ class FlaskyStyle(Style):
         Name.Variable.Class: "#000000",  # class: 'vc' - to be revised
         Name.Variable.Global: "#000000",  # class: 'vg' - to be revised
         Name.Variable.Instance: "#000000",  # class: 'vi' - to be revised
-
         Number: "#990000",  # class: 'm'
-
         Literal: "#000000",  # class: 'l'
         Literal.Date: "#000000",  # class: 'ld'
-
         String: "#4e9a06",  # class: 's'
         String.Backtick: "#4e9a06",  # class: 'sb'
         String.Char: "#4e9a06",  # class: 'sc'
@@ -71,7 +75,6 @@ class FlaskyStyle(Style):
         String.Regex: "#4e9a06",  # class: 'sr'
         String.Single: "#4e9a06",  # class: 's1'
         String.Symbol: "#4e9a06",  # class: 'ss'
-
         Generic: "#000000",  # class: 'g'
         Generic.Deleted: "#a40000",  # class: 'gd'
         Generic.Emph: "italic #000000",  # class: 'ge'

docs/conf.py

@@ -22,8 +22,8 @@ import sys
 # sys.path.insert(0, os.path.abspath('..'))
 
 # Insert Camelot's path into the system.
-sys.path.insert(0, os.path.abspath('..'))
-sys.path.insert(0, os.path.abspath('_themes'))
+sys.path.insert(0, os.path.abspath(".."))
+sys.path.insert(0, os.path.abspath("_themes"))
 
 import camelot
 
@@ -38,33 +38,33 @@ import camelot
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
 extensions = [
-    'sphinx.ext.autodoc',
-    'sphinx.ext.napoleon',
-    'sphinx.ext.intersphinx',
-    'sphinx.ext.todo',
-    'sphinx.ext.viewcode',
+    "sphinx.ext.autodoc",
+    "sphinx.ext.napoleon",
+    "sphinx.ext.intersphinx",
+    "sphinx.ext.todo",
+    "sphinx.ext.viewcode",
 ]
 
 # Add any paths that contain templates here, relative to this directory.
-templates_path = ['_templates']
+templates_path = ["_templates"]
 
 # The suffix(es) of source filenames.
 # You can specify multiple suffix as a list of string:
 #
 # source_suffix = ['.rst', '.md']
-source_suffix = '.rst'
+source_suffix = ".rst"
 
 # The encoding of source files.
 #
 # source_encoding = 'utf-8-sig'
 
 # The master toctree document.
-master_doc = 'index'
+master_doc = "index"
 
 # General information about the project.
-project = u'Camelot'
-copyright = u'2018, <a href="https://socialcops.com" target="_blank">SocialCops</a>'
-author = u'Vinayak Mehta'
+project = u"Camelot"
+copyright = u"2021, Camelot Developers"
+author = u"Vinayak Mehta"
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
@@ -94,7 +94,7 @@ language = None
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 # This patterns also effect to html_static_path and html_extra_path
-exclude_patterns = ['_build']
+exclude_patterns = ["_build"]
 
 # The reST default role (used for this markup: `text`) to use for all
 # documents.
@@ -114,7 +114,7 @@ add_module_names = True
 # show_authors = False
 
 # The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'flask_theme_support.FlaskyStyle'
+pygments_style = "flask_theme_support.FlaskyStyle"
 
 # A list of ignored prefixes for module index sorting.
 # modindex_common_prefix = []
@@ -130,18 +130,18 @@ todo_include_todos = True
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = 'alabaster'
+html_theme = "alabaster"
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
 # documentation.
 html_theme_options = {
-    'show_powered_by': False,
-    'github_user': 'socialcopsdev',
-    'github_repo': 'camelot',
-    'github_banner': True,
-    'show_related': False,
-    'note_bg': '#FFF59C'
+    "show_powered_by": False,
+    "github_user": "camelot-dev",
+    "github_repo": "camelot",
+    "github_banner": True,
+    "show_related": False,
+    "note_bg": "#FFF59C",
 }
 
 # Add any paths that contain custom themes here, relative to this directory.
@@ -164,12 +164,12 @@ html_theme_options = {
 # The name of an image file (relative to this directory) to use as a favicon of
 # the docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32
 # pixels large.
-html_favicon = '_static/favicon.ico'
+html_favicon = "_static/favicon.ico"
 
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
+html_static_path = ["_static"]
 
 # Add any extra paths that contain custom files (such as robots.txt or
 # .htaccess) here, relative to this directory. These files are copied
@@ -189,10 +189,21 @@ html_use_smartypants = True
 
 # Custom sidebar templates, maps document names to template names.
 html_sidebars = {
-    'index': ['sidebarintro.html', 'relations.html', 'sourcelink.html',
-              'searchbox.html', 'hacks.html'],
-    '**': ['sidebarlogo.html', 'localtoc.html', 'relations.html',
-           'sourcelink.html', 'searchbox.html', 'hacks.html']
+    "index": [
+        "sidebarintro.html",
+        "relations.html",
+        "sourcelink.html",
+        "searchbox.html",
+        "hacks.html",
+    ],
+    "**": [
+        "sidebarlogo.html",
+        "localtoc.html",
+        "relations.html",
+        "sourcelink.html",
+        "searchbox.html",
+        "hacks.html",
+    ],
 }
 
 # Additional templates that should be rendered to pages, maps page names to
@@ -249,7 +260,7 @@ html_show_copyright = True
 # html_search_scorer = 'scorer.js'
 
 # Output file base name for HTML help builder.
-htmlhelp_basename = 'Camelotdoc'
+htmlhelp_basename = "Camelotdoc"
 
 # -- Options for LaTeX output ---------------------------------------------
 
@@ -257,15 +268,12 @@ latex_elements = {
     # The paper size ('letterpaper' or 'a4paper').
     #
     # 'papersize': 'letterpaper',
-
     # The font size ('10pt', '11pt' or '12pt').
     #
     # 'pointsize': '10pt',
-
     # Additional stuff for the LaTeX preamble.
     #
     # 'preamble': '',
-
     # Latex figure (float) alignment
     #
     # 'figure_align': 'htbp',
@@ -275,8 +283,7 @@ latex_elements = {
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
 latex_documents = [
-    (master_doc, 'Camelot.tex', u'Camelot Documentation',
-     u'Vinayak Mehta', 'manual'),
+    (master_doc, "Camelot.tex", u"Camelot Documentation", u"Vinayak Mehta", "manual"),
 ]
 
 # The name of an image file (relative to this directory) to place at the top of
@@ -316,10 +323,7 @@ latex_documents = [
 
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
-man_pages = [
-    (master_doc, 'Camelot', u'Camelot Documentation',
-     [author], 1)
-]
+man_pages = [(master_doc, "Camelot", u"Camelot Documentation", [author], 1)]
 
 # If true, show URL addresses after external links.
 #
@@ -332,9 +336,15 @@ man_pages = [
 # (source start file, target name, title, author,
 #  dir menu entry, description, category)
 texinfo_documents = [
-    (master_doc, 'Camelot', u'Camelot Documentation',
-     author, 'Camelot', 'One line description of project.',
-     'Miscellaneous'),
+    (
+        master_doc,
+        "Camelot",
+        u"Camelot Documentation",
+        author,
+        "Camelot",
+        "One line description of project.",
+        "Miscellaneous",
+    ),
 ]
 
 # Documents to append as an appendix to all manuals.
@@ -356,6 +366,6 @@ texinfo_documents = [
 
 # Example configuration for intersphinx: refer to the Python standard library.
 intersphinx_mapping = {
-    'https://docs.python.org/2': None,
-    'http://pandas.pydata.org/pandas-docs/stable': None
+    "https://docs.python.org/2": None,
+    "http://pandas.pydata.org/pandas-docs/stable": None,
 }

docs/dev/contributing.rst

@@ -29,15 +29,15 @@ Your first contribution
 
 A great way to start contributing to Camelot is to pick an issue tagged with the `help wanted`_ or the `good first issue`_ tags. If you're unable to find a good first issue, feel free to contact the maintainer.
 
-.. _help wanted: https://github.com/socialcopsdev/camelot/labels/help%20wanted
-.. _good first issue: https://github.com/socialcopsdev/camelot/labels/good%20first%20issue
+.. _help wanted: https://github.com/camelot-dev/camelot/labels/help%20wanted
+.. _good first issue: https://github.com/camelot-dev/camelot/labels/good%20first%20issue
 
 Setting up a development environment
 ------------------------------------
 
 To install the dependencies needed for development, you can use pip::
 
-    $ pip install camelot-py[dev]
+    $ pip install "camelot-py[dev]"
 
 Alternatively, you can clone the project repository, and install using pip::
 
@@ -51,7 +51,7 @@ Submit a pull request
 
 The preferred workflow for contributing to Camelot is to fork the `project repository`_ on GitHub, clone, develop on a branch and then finally submit a pull request. Here are the steps:
 
-.. _project repository: https://github.com/socialcopsdev/camelot
+.. _project repository: https://github.com/camelot-dev/camelot
 
 1. Fork the project repository. Click on the ‘Fork’ button near the top of the page. This creates a copy of the code under your account on the GitHub.
 
@@ -134,7 +134,7 @@ Filing Issues
 
 We use `GitHub issues`_ to keep track of all issues and pull requests. Before opening an issue (which asks a question or reports a bug), please use GitHub search to look for existing issues (both open and closed) that may be similar.
 
-.. _GitHub issues: https://github.com/socialcopsdev/camelot/issues
+.. _GitHub issues: https://github.com/camelot-dev/camelot/issues
 
 Questions
 ^^^^^^^^^

docs/index.rst

@@ -8,15 +8,15 @@ Camelot: PDF Table Extraction for Humans
 
 Release v\ |version|. (:ref:`Installation <install>`)
 
-.. image:: https://travis-ci.org/socialcopsdev/camelot.svg?branch=master
-    :target: https://travis-ci.org/socialcopsdev/camelot
+.. image:: https://travis-ci.org/camelot-dev/camelot.svg?branch=master
+    :target: https://travis-ci.org/camelot-dev/camelot
 
 .. image:: https://readthedocs.org/projects/camelot-py/badge/?version=master
     :target: https://camelot-py.readthedocs.io/en/master/
     :alt: Documentation Status
 
-.. image:: https://codecov.io/github/socialcopsdev/camelot/badge.svg?branch=master&service=github
-    :target: https://codecov.io/github/socialcopsdev/camelot?branch=master
+.. image:: https://codecov.io/github/camelot-dev/camelot/badge.svg?branch=master&service=github
+    :target: https://codecov.io/github/camelot-dev/camelot?branch=master
 
 .. image:: https://img.shields.io/pypi/v/camelot-py.svg
     :target: https://pypi.org/project/camelot-py/
@@ -30,15 +30,21 @@ Release v\ |version|. (:ref:`Installation <install>`)
 .. image:: https://badges.gitter.im/camelot-dev/Lobby.png
     :target: https://gitter.im/camelot-dev/Lobby
 
-**Camelot** is a Python library that makes it easy for *anyone* to extract tables from PDF files!
+.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
+    :target: https://github.com/ambv/black
 
-.. note:: You can also check out `Excalibur`_, which is a web interface for Camelot!
+.. image:: https://img.shields.io/badge/continous%20quality-deepsource-lightgrey
+    :target: https://deepsource.io/gh/camelot-dev/camelot/?ref=repository-badge
+
+**Camelot** is a Python library that can help you extract tables from PDFs!
+
+.. note:: You can also check out `Excalibur`_, the web interface to Camelot!
 
 .. _Excalibur: https://github.com/camelot-dev/excalibur
 
 ----
 
-**Here's how you can extract tables from PDF files.** Check out the PDF used in this example `here`_.
+**Here's how you can extract tables from PDFs.** You can check out the PDF used in this example `here`_.
 
 .. _here: _static/pdf/foo.pdf
 
@@ -48,7 +54,7 @@ Release v\ |version|. (:ref:`Installation <install>`)
     >>> tables = camelot.read_pdf('foo.pdf')
     >>> tables
     <TableList n=1>
-    >>> tables.export('foo.csv', f='csv', compress=True) # json, excel, html
+    >>> tables.export('foo.csv', f='csv', compress=True) # json, excel, html, markdown, sqlite
     >>> tables[0]
     <Table shape=(7, 7)>
     >>> tables[0].parsing_report
@@ -58,35 +64,44 @@ Release v\ |version|. (:ref:`Installation <install>`)
         'order': 1,
         'page': 1
     }
-    >>> tables[0].to_csv('foo.csv') # to_json, to_excel, to_html
+    >>> tables[0].to_csv('foo.csv') # to_json, to_excel, to_html, to_markdown, to_sqlite
     >>> tables[0].df # get a pandas DataFrame!
 
 .. csv-table::
   :file: _static/csv/foo.csv
 
-There's a :ref:`command-line interface <cli>` too!
+Camelot also comes packaged with a :ref:`command-line interface <cli>`!
 
 .. note:: Camelot only works with text-based PDFs and not scanned documents. (As Tabula `explains`_, "If you can click and drag to select text in your table in a PDF viewer, then your PDF is text-based".)
 
+You can check out some frequently asked questions :ref:`here <faq>`.
+
 .. _explains: https://github.com/tabulapdf/tabula#why-tabula
 
 Why Camelot?
 ------------
 
-- **You are in control.** Unlike other libraries and tools which either give a nice output or fail miserably (with no in-between), Camelot gives you the power to tweak table extraction. (This is important since everything in the real world, including PDF table extraction, is fuzzy.)
-- *Bad* tables can be discarded based on **metrics** like accuracy and whitespace, without ever having to manually look at each table.
-- Each table is a **pandas DataFrame**, which seamlessly integrates into `ETL and data analysis workflows`_.
-- **Export** to multiple formats, including JSON, Excel and HTML.
-
-See `comparison with other PDF table extraction libraries and tools`_.
+- **Configurability**: Camelot gives you control over the table extraction process with :ref:`tweakable settings <advanced>`.
+- **Metrics**: You can discard bad tables based on metrics like accuracy and whitespace, without having to manually look at each table.
+- **Output**: Each table is extracted into a **pandas DataFrame**, which seamlessly integrates into `ETL and data analysis workflows`_. You can also export tables to multiple formats, which include CSV, JSON, Excel, HTML, Markdown, and Sqlite.
 
 .. _ETL and data analysis workflows: https://gist.github.com/vinayak-mehta/e5949f7c2410a0e12f25d3682dc9e873
-.. _comparison with other PDF table extraction libraries and tools: https://github.com/socialcopsdev/camelot/wiki/Comparison-with-other-PDF-Table-Extraction-libraries-and-tools
+
+See `comparison with similar libraries and tools`_.
+
+.. _comparison with similar libraries and tools: https://github.com/camelot-dev/camelot/wiki/Comparison-with-other-PDF-Table-Extraction-libraries-and-tools
+
+Support the development
+-----------------------
+
+If Camelot has helped you, please consider supporting its development with a one-time or monthly donation `on OpenCollective`_!
+
+.. _on OpenCollective: https://opencollective.com/camelot
 
 The User Guide
 --------------
 
-This part of the documentation begins with some background information about why Camelot was created, takes a small dip into the implementation details and then focuses on step-by-step instructions for getting the most out of Camelot.
+This part of the documentation begins with some background information about why Camelot was created, takes you through some implementation details, and then focuses on step-by-step instructions for getting the most out of Camelot.
 
 .. toctree::
    :maxdepth: 2
@@ -97,13 +112,13 @@ This part of the documentation begins with some background information about why
    user/how-it-works
    user/quickstart
    user/advanced
+   user/faq
    user/cli
 
 The API Documentation/Guide
 ---------------------------
 
-If you are looking for information on a specific function, class, or method,
-this part of the documentation is for you.
+If you are looking for information on a specific function, class, or method, this part of the documentation is for you.
 
 .. toctree::
    :maxdepth: 2
@@ -113,8 +128,7 @@ this part of the documentation is for you.
 The Contributor Guide
 ---------------------
 
-If you want to contribute to the project, this part of the documentation is for
-you.
+If you want to contribute to the project, this part of the documentation is for you.
 
 .. toctree::
    :maxdepth: 2

docs/user/advanced.rst

@@ -66,8 +66,7 @@ Let's plot all the text present on the table's PDF page.
 
 ::
 
-    >>> camelot.plot(tables[0], kind='text')
-    >>> plt.show()
+    >>> camelot.plot(tables[0], kind='text').show()
 
 .. tip::
     Here's how you can do the same with the :ref:`command-line interface <cli>`.
@@ -93,8 +92,7 @@ Let's plot the table (to see if it was detected correctly or not). This plot typ
 
 ::
 
-    >>> camelot.plot(tables[0], kind='grid')
-    >>> plt.show()
+    >>> camelot.plot(tables[0], kind='grid').show()
 
 .. tip::
     Here's how you can do the same with the :ref:`command-line interface <cli>`.
@@ -118,8 +116,7 @@ Now, let's plot all table boundaries present on the table's PDF page.
 
 ::
 
-    >>> camelot.plot(tables[0], kind='contour')
-    >>> plt.show()
+    >>> camelot.plot(tables[0], kind='contour').show()
 
 .. tip::
     Here's how you can do the same with the :ref:`command-line interface <cli>`.
@@ -141,8 +138,7 @@ Cool, let's plot all line segments present on the table's PDF page.
 
 ::
 
-    >>> camelot.plot(tables[0], kind='line')
-    >>> plt.show()
+    >>> camelot.plot(tables[0], kind='line').show()
 
 .. tip::
     Here's how you can do the same with the :ref:`command-line interface <cli>`.
@@ -164,8 +160,7 @@ Finally, let's plot all line intersections present on the table's PDF page.
 
 ::
 
-    >>> camelot.plot(tables[0], kind='joint')
-    >>> plt.show()
+    >>> camelot.plot(tables[0], kind='joint').show()
 
 .. tip::
     Here's how you can do the same with the :ref:`command-line interface <cli>`.
@@ -187,8 +182,7 @@ You can also visualize the textedges found on a page by specifying ``kind='texte
 
 ::
 
-    >>> camelot.plot(tables[0], kind='textedge')
-    >>> plt.show()
+    >>> camelot.plot(tables[0], kind='textedge').show()
 
 .. tip::
     Here's how you can do the same with the :ref:`command-line interface <cli>`.
@@ -224,10 +218,12 @@ Table areas that you want Camelot to analyze can be passed as a list of comma-se
 .. csv-table::
   :file: ../_static/csv/table_areas.csv
 
+.. note:: ``table_areas`` accepts strings of the form x1,y1,x2,y2 where (x1, y1) -> top-left and (x2, y2) -> bottom-right in PDF coordinate space. In PDF coordinate space, the bottom-left corner of the page is the origin, with coordinates (0, 0).
+
 Specify table regions
 ---------------------
 
-However there may be cases like `[1] <../_static/pdf/table_regions.pdf>`__ and `[2] <https://github.com/socialcopsdev/camelot/blob/master/tests/files/tableception.pdf>`__, where the table might not lie at the exact coordinates every time but in an approximate region.
+However there may be cases like `[1] <../_static/pdf/table_regions.pdf>`__ and `[2] <https://github.com/camelot-dev/camelot/blob/master/tests/files/tableception.pdf>`__, where the table might not lie at the exact coordinates every time but in an approximate region.
 
 You can use the ``table_regions`` keyword argument to :meth:`read_pdf() <camelot.read_pdf>` to solve for such cases. When ``table_regions`` is specified, Camelot will only analyze the specified regions to look for tables.
 
@@ -314,7 +310,7 @@ In this case, the text that `other tools`_ return, will be ``24.912``. This is r
 
 You can solve this by passing ``flag_size=True``, which will enclose the superscripts and subscripts with ``<s></s>``, based on font size, as shown below.
 
-.. _other tools: https://github.com/socialcopsdev/camelot/wiki/Comparison-with-other-PDF-Table-Extraction-libraries-and-tools
+.. _other tools: https://github.com/camelot-dev/camelot/wiki/Comparison-with-other-PDF-Table-Extraction-libraries-and-tools
 
 ::
 
@@ -338,7 +334,7 @@ You can solve this by passing ``flag_size=True``, which will enclose the supersc
 Strip characters from text
 --------------------------
 
-You can strip unwanted characters like spaces, dots and newlines from a string using the ``strip_text`` keyword argument. Take a look at `this PDF <https://github.com/socialcopsdev/camelot/blob/master/tests/files/tabula/12s0324.pdf>`_ as an example, the text at the start of each row contains a lot of unwanted spaces, dots and newlines.
+You can strip unwanted characters like spaces, dots and newlines from a string using the ``strip_text`` keyword argument. Take a look at `this PDF <https://github.com/camelot-dev/camelot/blob/master/tests/files/tabula/12s0324.pdf>`_ as an example, the text at the start of each row contains a lot of unwanted spaces, dots and newlines.
 
 ::
 
@@ -364,7 +360,7 @@ You can strip unwanted characters like spaces, dots and newlines from a string u
 Improve guessed table areas
 ---------------------------
 
-While using :ref:`Stream <stream>`, automatic table detection can fail for PDFs like `this one <https://github.com/socialcopsdev/camelot/blob/master/tests/files/edge_tol.pdf>`_. That's because the text is relatively far apart vertically, which can lead to shorter textedges being calculated.
+While using :ref:`Stream <stream>`, automatic table detection can fail for PDFs like `this one <https://github.com/camelot-dev/camelot/blob/master/tests/files/edge_tol.pdf>`_. That's because the text is relatively far apart vertically, which can lead to shorter textedges being calculated.
 
 .. note:: To know more about how textedges are calculated to guess table areas, you can see pages 20, 35 and 40 of `Anssi Nurminen's master's thesis <http://dspace.cc.tut.fi/dpub/bitstream/handle/123456789/21520/Nurminen.pdf?sequence=3>`_.
 
@@ -373,8 +369,7 @@ Let's see the table area that is detected by default.
 ::
 
     >>> tables = camelot.read_pdf('edge_tol.pdf', flavor='stream')
-    >>> camelot.plot(tables[0], kind='contour')
-    >>> plt.show()
+    >>> camelot.plot(tables[0], kind='contour').show()
 
 .. tip::
     Here's how you can do the same with the :ref:`command-line interface <cli>`.
@@ -394,8 +389,7 @@ To improve the detected area, you can increase the ``edge_tol`` (default: 50) va
 ::
 
     >>> tables = camelot.read_pdf('edge_tol.pdf', flavor='stream', edge_tol=500)
-    >>> camelot.plot(tables[0], kind='contour')
-    >>> plt.show()
+    >>> camelot.plot(tables[0], kind='contour').show()
 
 .. tip::
     Here's how you can do the same with the :ref:`command-line interface <cli>`.
@@ -470,8 +464,7 @@ Let's plot the table for this PDF.
 ::
 
     >>> tables = camelot.read_pdf('short_lines.pdf')
-    >>> camelot.plot(tables[0], kind='grid')
-    >>> plt.show()
+    >>> camelot.plot(tables[0], kind='grid').show()
 
 .. figure:: ../_static/png/short_lines_1.png
     :alt: A plot of the PDF table with short lines
@@ -482,8 +475,7 @@ Clearly, the smaller lines separating the headers, couldn't be detected. Let's t
 ::
 
     >>> tables = camelot.read_pdf('short_lines.pdf', line_scale=40)
-    >>> camelot.plot(tables[0], kind='grid')
-    >>> plt.show()
+    >>> camelot.plot(tables[0], kind='grid').show()
 
 .. tip::
     Here's how you can do the same with the :ref:`command-line interface <cli>`.
@@ -624,10 +616,33 @@ We don't need anything else. Now, let's pass ``copy_text=['v']`` to copy text in
 Tweak layout generation
 -----------------------
 
-Camelot is built on top of PDFMiner's functionality of grouping characters on a page into words and sentences. In some cases (such as `#170 <https://github.com/socialcopsdev/camelot/issues/170>`_ and `#215 <https://github.com/socialcopsdev/camelot/issues/215>`_), PDFMiner can group characters that should belong to the same sentence into separate sentences.
+Camelot is built on top of PDFMiner's functionality of grouping characters on a page into words and sentences. In some cases (such as `#170 <https://github.com/camelot-dev/camelot/issues/170>`_ and `#215 <https://github.com/camelot-dev/camelot/issues/215>`_), PDFMiner can group characters that should belong to the same sentence into separate sentences.
 
-To deal with such cases, you can tweak PDFMiner's `LAParams kwargs <https://github.com/euske/pdfminer/blob/master/pdfminer/layout.py#L33>`_ to improve layout generation, by passing the keyword arguments as a dict using ``layout_kwargs`` in :meth:`read_pdf() <camelot.read_pdf>`. To know more about the parameters you can tweak, you can check out `PDFMiner docs <https://euske.github.io/pdfminer/>`_.
+To deal with such cases, you can tweak PDFMiner's `LAParams kwargs <https://github.com/euske/pdfminer/blob/master/pdfminer/layout.py#L33>`_ to improve layout generation, by passing the keyword arguments as a dict using ``layout_kwargs`` in :meth:`read_pdf() <camelot.read_pdf>`. To know more about the parameters you can tweak, you can check out `PDFMiner docs <https://pdfminersix.rtfd.io/en/latest/reference/composable.html>`_.
 
 ::
 
     >>> tables = camelot.read_pdf('foo.pdf', layout_kwargs={'detect_vertical': False})
+
+.. _image-conversion-backend:
+
+Use alternate image conversion backends
+---------------------------------------
+
+When using the :ref:`Lattice <lattice>` flavor, Camelot uses ``ghostscript`` to convert PDF pages to images for line recognition. If you face installation issues with ``ghostscript``, you can use an alternate image conversion backend called ``poppler``. You can specify which image conversion backend you want to use with::
+
+    >>> tables = camelot.read_pdf(filename, backend="ghostscript")  # default
+    >>> tables = camelot.read_pdf(filename, backend="poppler")
+
+.. note:: ``ghostscript`` will be replaced by ``poppler`` as the default image conversion backend in ``v0.12.0``.
+
+If you face issues with both ``ghostscript`` and ``poppler``, you can supply your own image conversion backend::
+
+    >>> class ConversionBackend(object):
+    >>>     def convert(pdf_path, png_path):
+    >>>         # read pdf page from pdf_path
+    >>>         # convert pdf page to image
+    >>>         # write image to png_path
+    >>>         pass
+    >>>
+    >>> tables = camelot.read_pdf(filename, backend=ConversionBackend())

docs/user/cli.rst

@@ -26,6 +26,8 @@ You can print the help for the interface by typing ``camelot --help`` in your fa
     -split, --split_text            Split text that spans across multiple cells.
     -flag, --flag_size              Flag text based on font size. Useful to
                                     detect super/subscripts.
+    -strip, --strip_text            Characters that should be stripped from a
+                                    string before assigning it to a cell.
     -M, --margins <FLOAT FLOAT FLOAT>...
                                     PDFMiner char_margin, line_margin and
                                     word_margin.

docs/user/faq.rst

@@ -0,0 +1,70 @@
+.. _faq:
+
+Frequently Asked Questions
+==========================
+
+This part of the documentation answers some common questions. To add questions, please open an issue `here <https://github.com/camelot-dev/camelot/issues/new>`_.
+
+Does Camelot work with image-based PDFs?
+----------------------------------------
+
+**No**, Camelot only works with text-based PDFs and not scanned documents. (As Tabula `explains <https://github.com/tabulapdf/tabula#why-tabula>`_, "If you can click and drag to select text in your table in a PDF viewer, then your PDF is text-based".)
+
+How to reduce memory usage for long PDFs?
+-----------------------------------------
+
+During table extraction from long PDF documents, RAM usage can grow significantly.
+
+A simple workaround is to divide the extraction into chunks, and save extracted data to disk at the end of every chunk.
+
+For more details, check out this code snippet from `@anakin87 <https://github.com/anakin87>`_:
+
+::
+
+    import camelot
+
+
+    def chunks(l, n):
+        """Yield successive n-sized chunks from l."""
+        for i in range(0, len(l), n):
+            yield l[i : i + n]
+
+
+    def extract_tables(filepath, pages, chunks=50, export_path=".", params={}):
+        """
+        Divide the extraction work into n chunks. At the end of every chunk,
+        save data on disk and free RAM.
+
+        filepath : str
+            Filepath or URL of the PDF file.
+        pages : str, optional (default: '1')
+            Comma-separated page numbers.
+            Example: '1,3,4' or '1,4-end' or 'all'.
+        """
+
+        # get list of pages from camelot.handlers.PDFHandler
+        handler = camelot.handlers.PDFHandler(filepath)
+        page_list = handler._get_pages(filepath, pages=pages)
+
+        # chunk pages list
+        page_chunks = list(chunks(page_list, chunks))
+
+        # extraction and export
+        for chunk in page_chunks:
+            pages_string = str(chunk).replace("[", "").replace("]", "")
+            tables = camelot.read_pdf(filepath, pages=pages_string, **params)
+            tables.export(f"{export_path}/tables.csv")
+
+How can I supply my own image conversion backend to Lattice?
+------------------------------------------------------------
+
+When using the :ref:`Lattice <lattice>` flavor, you can supply your own :ref:`image conversion backend <image-conversion-backend>` by creating a class with a ``convert`` method as follows::
+
+    >>> class ConversionBackend(object):
+    >>>     def convert(pdf_path, png_path):
+    >>>         # read pdf page from pdf_path
+    >>>         # convert pdf page to image
+    >>>         # write image to png_path
+    >>>         pass
+    >>>
+    >>> tables = camelot.read_pdf(filename, backend=ConversionBackend())

docs/user/how-it-works.rst

@@ -16,11 +16,11 @@ Stream can be used to parse tables that have whitespaces between cells to simula
 
 1. Words on the PDF page are grouped into text rows based on their *y* axis overlaps.
 
-2. Textedges are calculated and then used to guess interesting table areas on the PDF page. You can read `Anssi Nurminen's master's thesis <http://dspace.cc.tut.fi/dpub/bitstream/handle/123456789/21520/Nurminen.pdf?sequence=3>`_ to know more about this table detection technique. [See pages 20, 35 and 40]
+2. Textedges are calculated and then used to guess interesting table areas on the PDF page. You can read `Anssi Nurminen's master's thesis <https://pdfs.semanticscholar.org/a9b1/67a86fb189bfcd366c3839f33f0404db9c10.pdf>`_ to know more about this table detection technique. [See pages 20, 35 and 40]
 
 3. The number of columns inside each table area are then guessed. This is done by calculating the mode of number of words in each text row. Based on this mode, words in each text row are chosen to calculate a list of column *x* ranges.
 
-4. Words that lie inside/outside the current column *x* ranges are then used to extend extend the current list of columns.
+4. Words that lie inside/outside the current column *x* ranges are then used to extend the current list of columns.
 
 5. Finally, a table is formed using the text rows' *y* ranges and column *x* ranges and words found on the page are assigned to the table's cells based on their *x* and *y* coordinates.
 

docs/user/install-deps.rst

@@ -3,72 +3,60 @@
 Installation of dependencies
 ============================
 
-The dependencies `Tkinter`_ and `ghostscript`_ can be installed using your system's package manager. You can run one of the following, based on your OS.
-
-.. _Tkinter: https://wiki.python.org/moin/TkInter
-.. _ghostscript: https://www.ghostscript.com
+The dependencies `Ghostscript <https://www.ghostscript.com>`_ and `Tkinter <https://wiki.python.org/moin/TkInter>`_ can be installed using your system's package manager or by running their installer.
 
 OS-specific instructions
 ------------------------
 
-For Ubuntu
-^^^^^^^^^^
+Ubuntu
+^^^^^^
 ::
 
-    $ apt install python-tk ghostscript
+    $ apt install ghostscript python3-tk
 
-Or for Python 3::
-
-    $ apt install python3-tk ghostscript
-
-For macOS
-^^^^^^^^^
+MacOS
+^^^^^
 ::
 
-    $ brew install tcl-tk ghostscript
+    $ brew install ghostscript tcl-tk
 
-For Windows
-^^^^^^^^^^^
+Windows
+^^^^^^^
 
-For Tkinter, you can download the `ActiveTcl Community Edition`_ from ActiveState. For ghostscript, you can get the installer at the `ghostscript downloads page`_.
+For Ghostscript, you can get the installer at their `downloads page <https://www.ghostscript.com/download/gsdnld.html>`_. And for Tkinter, you can download the `ActiveTcl Community Edition <https://www.activestate.com/activetcl/downloads>`_ from ActiveState.
 
-.. _ActiveTcl Community Edition: https://www.activestate.com/activetcl/downloads
-.. _ghostscript downloads page: https://www.ghostscript.com/download/gsdnld.html
-.. _as shown here: https://java.com/en/download/help/path.xml
+Checks to see if dependencies are installed correctly
+-----------------------------------------------------
 
-Checks to see if dependencies were installed correctly
-------------------------------------------------------
+You can run the following checks to see if the dependencies were installed correctly.
 
-You can do the following checks to see if the dependencies were installed correctly.
+For Ghostscript
+^^^^^^^^^^^^^^^
+
+Open the Python REPL and run the following:
+
+For Ubuntu/MacOS::
+
+    >>> from ctypes.util import find_library
+    >>> find_library("gs")
+    "libgs.so.9"
+
+For Windows::
+
+    >>> import ctypes
+    >>> from ctypes.util import find_library
+    >>> find_library("".join(("gsdll", str(ctypes.sizeof(ctypes.c_voidp) * 8), ".dll")))
+    <name-of-ghostscript-library-on-windows>
+
+**Check:** The output of the ``find_library`` function should not be empty.
+
+If the output is empty, then it's possible that the Ghostscript library is not available one of the ``LD_LIBRARY_PATH``/``DYLD_LIBRARY_PATH``/``PATH`` variables depending on your operating system. In this case, you may have to modify one of those path variables.
 
 For Tkinter
 ^^^^^^^^^^^
 
-Launch Python, and then at the prompt, type::
-
-    >>> import Tkinter
-
-Or in Python 3::
+Launch Python and then import Tkinter::
 
     >>> import tkinter
 
-If you have Tkinter, Python will not print an error message, and if not, you will see an ``ImportError``.
-
-For ghostscript
-^^^^^^^^^^^^^^^
-
-Run the following to check the ghostscript version.
-
-For Ubuntu/macOS::
-
-    $ gs -version
-
-For Windows::
-
-    C:\> gswin64c.exe -version
-
-Or for Windows 32-bit::
-
-    C:\> gswin32c.exe -version
-
-If you have ghostscript, you should see the ghostscript version and copyright information.
+**Check:** Importing ``tkinter`` should not raise an import error.

docs/user/install.rst

@@ -5,43 +5,36 @@ Installation of Camelot
 
 This part of the documentation covers the steps to install Camelot.
 
-Using conda
------------
+After :ref:`installing the dependencies <install_deps>`, which include `Ghostscript <https://www.ghostscript.com>`_ and `Tkinter <https://wiki.python.org/moin/TkInter>`_, you can use one of the following methods to install Camelot:
 
-The easiest way to install Camelot is to install it with `conda`_, which is a package manager and environment management system for the `Anaconda`_ distribution.
-::
+.. warning:: The ``lattice`` flavor will fail to run if Ghostscript is not installed. You may run into errors as shown in `issue #193 <https://github.com/camelot-dev/camelot/issues/193>`_.
+
+pip
+---
+
+To install Camelot from PyPI using ``pip``, please include the extra ``cv`` requirement as shown::
+
+    $ pip install "camelot-py[base]"
+
+conda
+-----
+
+`conda`_ is a package manager and environment management system for the `Anaconda <https://anaconda.org>`_ distribution. It can be used to install Camelot from the ``conda-forge`` channel::
 
     $ conda install -c conda-forge camelot-py
 
-.. note:: Camelot is available for Python 2.7, 3.5 and 3.6 on Linux, macOS and Windows. For Windows, you will need to install ghostscript which you can get from their `downloads page`_.
-
-.. _conda: https://conda.io/docs/
-.. _Anaconda: http://docs.continuum.io/anaconda/
-.. _downloads page: https://www.ghostscript.com/download/gsdnld.html
-.. _conda-forge: https://conda-forge.org/
-
-Using pip
----------
-
-After :ref:`installing the dependencies <install_deps>`, which include `Tkinter`_ and `ghostscript`_, you can simply use pip to install Camelot::
-
-    $ pip install camelot-py[cv]
-
-.. _Tkinter: https://wiki.python.org/moin/TkInter
-.. _ghostscript: https://www.ghostscript.com
-
 From the source code
 --------------------
 
-After :ref:`installing the dependencies <install_deps>`, you can install from the source by:
+After :ref:`installing the dependencies <install_deps>`, you can install Camelot from source by:
 
 1. Cloning the GitHub repository.
 ::
 
-    $ git clone https://www.github.com/socialcopsdev/camelot
+    $ git clone https://www.github.com/camelot-dev/camelot
 
-2. Then simply using pip again.
+2. And then simply using pip again.
 ::
 
     $ cd camelot
-    $ pip install ".[cv]"
+    $ pip install ".[base]"

docs/user/intro.rst

@@ -27,7 +27,7 @@ Here is a `comparison`_ of Camelot's output with outputs from other open-source
 .. _pdf-table-extract: https://github.com/ashima/pdf-table-extract
 .. _PDFTables: https://pdftables.com/
 .. _Smallpdf: https://smallpdf.com
-.. _comparison: https://github.com/socialcopsdev/camelot/wiki/Comparison-with-other-PDF-Table-Extraction-libraries-and-tools
+.. _comparison: https://github.com/camelot-dev/camelot/wiki/Comparison-with-other-PDF-Table-Extraction-libraries-and-tools
 
 What's in a name?
 -----------------

docs/user/quickstart.rst

@@ -56,7 +56,7 @@ Woah! The accuracy is top-notch and there is less whitespace, which means the ta
 .. csv-table::
   :file: ../_static/csv/foo.csv
 
-Looks good! You can now export the table as a CSV file using its :meth:`to_csv() <camelot.core.Table.to_csv>` method. Alternatively you can use :meth:`to_json() <camelot.core.Table.to_json>`, :meth:`to_excel() <camelot.core.Table.to_excel>` :meth:`to_html() <camelot.core.Table.to_html>` or :meth:`to_sqlite() <camelot.core.Table.to_sqlite>` methods to export the table as JSON, Excel, HTML files or a sqlite database respectively.
+Looks good! You can now export the table as a CSV file using its :meth:`to_csv() <camelot.core.Table.to_csv>` method. Alternatively you can use :meth:`to_json() <camelot.core.Table.to_json>`, :meth:`to_excel() <camelot.core.Table.to_excel>` :meth:`to_html() <camelot.core.Table.to_html>` :meth:`to_markdown() <camelot.core.Table.to_markdown>` or :meth:`to_sqlite() <camelot.core.Table.to_sqlite>` methods to export the table as JSON, Excel, HTML files or a sqlite database respectively.
 
 ::
 
@@ -76,7 +76,7 @@ You can also export all tables at once, using the :class:`tables <camelot.core.T
 
         $ camelot --format csv --output foo.csv lattice foo.pdf
 
-This will export all tables as CSV files at the path specified. Alternatively, you can use ``f='json'``, ``f='excel'``, ``f='html'`` or ``f='sqlite'``.
+This will export all tables as CSV files at the path specified. Alternatively, you can use ``f='json'``, ``f='excel'``, ``f='html'``, ``f='markdown'`` or ``f='sqlite'``.
 
 .. note:: The :meth:`export() <camelot.core.TableList.export>` method exports files with a ``page-*-table-*`` suffix. In the example above, the single table in the list will be exported to ``foo-page-1-table-1.csv``. If the list contains multiple tables, multiple CSV files will be created. To avoid filling up your path with multiple files, you can use ``compress=True``, which will create a single ZIP file at your path with all the CSV files.
 

requirements.txt

@@ -1,8 +0,0 @@
-click>=6.7
-matplotlib>=2.2.3
-numpy>=1.13.3
-opencv-python>=3.4.2.17
-openpyxl>=2.5.8
-pandas>=0.23.4
-pdfminer.six>=20170720
-PyPDF2>=1.26.0

setup.py

@@ -6,76 +6,78 @@ from setuptools import find_packages
 
 here = os.path.abspath(os.path.dirname(__file__))
 about = {}
-with open(os.path.join(here, 'camelot', '__version__.py'), 'r') as f:
+with open(os.path.join(here, "camelot", "__version__.py"), "r") as f:
     exec(f.read(), about)
 
-with open('README.md', 'r') as f:
+with open("README.md", "r") as f:
     readme = f.read()
 
 
 requires = [
-    'chardet>=3.0.4',
-    'click>=6.7',
-    'numpy>=1.13.3',
-    'openpyxl>=2.5.8',
-    'pandas>=0.23.4',
-    'pdfminer.six>=20170720',
-    'PyPDF2>=1.26.0'
+    "chardet>=3.0.4",
+    "click>=6.7",
+    "numpy>=1.13.3",
+    "openpyxl>=2.5.8",
+    "pandas>=0.23.4",
+    "pdfminer.six>=20200726",
+    "PyPDF2>=1.26.0",
+    "tabulate>=0.8.9",
 ]
 
-cv_requires = [
-    'opencv-python>=3.4.2.17'
-]
+base_requires = ["ghostscript>=0.7", "opencv-python>=3.4.2.17", "pdftopng>=0.2.3"]
 
 plot_requires = [
-    'matplotlib>=2.2.3',
+    "matplotlib>=2.2.3",
 ]
 
 dev_requires = [
-    'codecov>=2.0.15',
-    'pytest>=3.8.0',
-    'pytest-cov>=2.6.0',
-    'pytest-mpl>=0.10',
-    'pytest-runner>=4.2',
-    'Sphinx>=1.7.9'
+    "codecov>=2.0.15",
+    "pytest>=5.4.3",
+    "pytest-cov>=2.10.0",
+    "pytest-mpl>=0.11",
+    "pytest-runner>=5.2",
+    "Sphinx>=3.1.2",
+    "sphinx-autobuild>=2021.3.14",
 ]
 
-all_requires = cv_requires + plot_requires
+all_requires = base_requires + plot_requires
 dev_requires = dev_requires + all_requires
 
 
 def setup_package():
-    metadata = dict(name=about['__title__'],
-                    version=about['__version__'],
-                    description=about['__description__'],
+    metadata = dict(
+        name=about["__title__"],
+        version=about["__version__"],
+        description=about["__description__"],
         long_description=readme,
         long_description_content_type="text/markdown",
-                    url=about['__url__'],
-                    author=about['__author__'],
-                    author_email=about['__author_email__'],
-                    license=about['__license__'],
-                    packages=find_packages(exclude=('tests',)),
+        url=about["__url__"],
+        author=about["__author__"],
+        author_email=about["__author_email__"],
+        license=about["__license__"],
+        packages=find_packages(exclude=("tests",)),
         install_requires=requires,
         extras_require={
-                        'all': all_requires,
-                        'cv': cv_requires,
-                        'dev': dev_requires,
-                        'plot': plot_requires
+            "all": all_requires,
+            "base": base_requires,
+            "cv": base_requires,  # deprecate
+            "dev": dev_requires,
+            "plot": plot_requires,
         },
         entry_points={
-                        'console_scripts': [
-                            'camelot = camelot.cli:cli',
+            "console_scripts": [
+                "camelot = camelot.cli:cli",
             ],
         },
         classifiers=[
             # Trove classifiers
             # Full list: https://pypi.python.org/pypi?%3Aaction=list_classifiers
-                        'License :: OSI Approved :: MIT License',
-                        'Programming Language :: Python :: 2.7',
-                        'Programming Language :: Python :: 3.5',
-                        'Programming Language :: Python :: 3.6',
-                        'Programming Language :: Python :: 3.7'
-                    ])
+            "License :: OSI Approved :: MIT License",
+            "Programming Language :: Python :: 3.6",
+            "Programming Language :: Python :: 3.7",
+            "Programming Language :: Python :: 3.8",
+        ],
+    )
 
     try:
         from setuptools import setup
@@ -85,5 +87,5 @@ def setup_package():
     setup(**metadata)
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     setup_package()

tests/__init__.py

@@ -1,2 +1,3 @@
 import matplotlib
-matplotlib.use('agg')
+
+matplotlib.use("agg")

tests/test_cli.py

@@ -1,7 +1,9 @@
 # -*- coding: utf-8 -*-
 
 import os
+import sys
 
+import pytest
 from click.testing import CliRunner
 
 from camelot.cli import cli
@@ -9,109 +11,181 @@ from camelot.utils import TemporaryDirectory
 
 
 testdir = os.path.dirname(os.path.abspath(__file__))
-testdir = os.path.join(testdir, 'files')
+testdir = os.path.join(testdir, "files")
+
+skip_on_windows = pytest.mark.skipif(
+    sys.platform.startswith("win"),
+    reason="Ghostscript not installed in Windows test environment",
+)
 
 
+def test_help_output():
+    runner = CliRunner()
+    prog_name = runner.get_default_prog_name(cli)
+    result = runner.invoke(cli, ["--help"])
+    output = result.output
+
+    assert prog_name == "camelot"
+    assert result.output.startswith("Usage: %(prog_name)s [OPTIONS] COMMAND" % locals())
+    assert all(
+        v in result.output
+        for v in ["Options:", "--version", "--help", "Commands:", "lattice", "stream"]
+    )
+
+
+@skip_on_windows
 def test_cli_lattice():
     with TemporaryDirectory() as tempdir:
-        infile = os.path.join(testdir, 'foo.pdf')
-        outfile = os.path.join(tempdir, 'foo.csv')
+        infile = os.path.join(testdir, "foo.pdf")
+        outfile = os.path.join(tempdir, "foo.csv")
         runner = CliRunner()
-        result = runner.invoke(cli, ['--format', 'csv', '--output', outfile,
-                                     'lattice', infile])
+        result = runner.invoke(
+            cli, ["--format", "csv", "--output", outfile, "lattice", infile]
+        )
         assert result.exit_code == 0
-        assert result.output == 'Found 1 tables\n'
+        assert "Found 1 tables" in result.output
 
-        result = runner.invoke(cli, ['--format', 'csv',
-                                     'lattice', infile])
-        output_error = 'Error: Please specify output file path using --output'
+        result = runner.invoke(cli, ["--format", "csv", "lattice", infile])
+        output_error = "Error: Please specify output file path using --output"
         assert output_error in result.output
 
-        result = runner.invoke(cli, ['--output', outfile,
-                                     'lattice', infile])
-        format_error = 'Please specify output file format using --format'
+        result = runner.invoke(cli, ["--output", outfile, "lattice", infile])
+        format_error = "Please specify output file format using --format"
         assert format_error in result.output
 
 
 def test_cli_stream():
     with TemporaryDirectory() as tempdir:
-        infile = os.path.join(testdir, 'budget.pdf')
-        outfile = os.path.join(tempdir, 'budget.csv')
+        infile = os.path.join(testdir, "budget.pdf")
+        outfile = os.path.join(tempdir, "budget.csv")
         runner = CliRunner()
-        result = runner.invoke(cli, ['--format', 'csv', '--output', outfile,
-                                     'stream', infile])
+        result = runner.invoke(
+            cli, ["--format", "csv", "--output", outfile, "stream", infile]
+        )
         assert result.exit_code == 0
-        assert result.output == 'Found 1 tables\n'
+        assert result.output == "Found 1 tables\n"
 
-        result = runner.invoke(cli, ['--format', 'csv', 'stream', infile])
-        output_error = 'Error: Please specify output file path using --output'
+        result = runner.invoke(cli, ["--format", "csv", "stream", infile])
+        output_error = "Error: Please specify output file path using --output"
         assert output_error in result.output
 
-        result = runner.invoke(cli, ['--output', outfile, 'stream', infile])
-        format_error = 'Please specify output file format using --format'
+        result = runner.invoke(cli, ["--output", outfile, "stream", infile])
+        format_error = "Please specify output file format using --format"
         assert format_error in result.output
 
 
 def test_cli_password():
     with TemporaryDirectory() as tempdir:
-        infile = os.path.join(testdir, 'health_protected.pdf')
-        outfile = os.path.join(tempdir, 'health_protected.csv')
+        infile = os.path.join(testdir, "health_protected.pdf")
+        outfile = os.path.join(tempdir, "health_protected.csv")
         runner = CliRunner()
-        result = runner.invoke(cli, ['--password', 'userpass',
-                                     '--format', 'csv', '--output', outfile,
-                                     'stream', infile])
+        result = runner.invoke(
+            cli,
+            [
+                "--password",
+                "userpass",
+                "--format",
+                "csv",
+                "--output",
+                outfile,
+                "stream",
+                infile,
+            ],
+        )
         assert result.exit_code == 0
-        assert result.output == 'Found 1 tables\n'
+        assert result.output == "Found 1 tables\n"
 
-        output_error = 'file has not been decrypted'
+        output_error = "file has not been decrypted"
         # no password
-        result = runner.invoke(cli, ['--format', 'csv', '--output', outfile,
-                                     'stream', infile])
+        result = runner.invoke(
+            cli, ["--format", "csv", "--output", outfile, "stream", infile]
+        )
         assert output_error in str(result.exception)
 
         # bad password
-        result = runner.invoke(cli, ['--password', 'wrongpass',
-                                     '--format', 'csv', '--output', outfile,
-                                     'stream', infile])
+        result = runner.invoke(
+            cli,
+            [
+                "--password",
+                "wrongpass",
+                "--format",
+                "csv",
+                "--output",
+                outfile,
+                "stream",
+                infile,
+            ],
+        )
         assert output_error in str(result.exception)
 
 
 def test_cli_output_format():
     with TemporaryDirectory() as tempdir:
-        infile = os.path.join(testdir, 'health.pdf')
-        outfile = os.path.join(tempdir, 'health.{}')
+        infile = os.path.join(testdir, "health.pdf")
+
         runner = CliRunner()
 
         # json
-        result = runner.invoke(cli, ['--format', 'json', '--output', outfile.format('json'),
-                                     'stream', infile])
-        assert result.exit_code == 0
+        outfile = os.path.join(tempdir, "health.json")
+        result = runner.invoke(
+            cli,
+            ["--format", "json", "--output", outfile, "stream", infile],
+        )
+        assert result.exit_code == 0, f"Output: {result.output}"
 
         # excel
-        result = runner.invoke(cli, ['--format', 'excel', '--output', outfile.format('xlsx'),
-                                     'stream', infile])
-        assert result.exit_code == 0
+        outfile = os.path.join(tempdir, "health.xlsx")
+        result = runner.invoke(
+            cli,
+            ["--format", "excel", "--output", outfile, "stream", infile],
+        )
+        assert result.exit_code == 0, f"Output: {result.output}"
 
         # html
-        result = runner.invoke(cli, ['--format', 'html', '--output', outfile.format('html'),
-                                     'stream', infile])
-        assert result.exit_code == 0
+        outfile = os.path.join(tempdir, "health.html")
+        result = runner.invoke(
+            cli,
+            ["--format", "html", "--output", outfile, "stream", infile],
+        )
+        assert result.exit_code == 0, f"Output: {result.output}"
+
+        # markdown
+        outfile = os.path.join(tempdir, "health.md")
+        result = runner.invoke(
+            cli,
+            ["--format", "markdown", "--output", outfile, "stream", infile],
+        )
+        assert result.exit_code == 0, f"Output: {result.output}"
 
         # zip
-        result = runner.invoke(cli, ['--zip', '--format', 'csv', '--output', outfile.format('csv'),
-                                     'stream', infile])
-        assert result.exit_code == 0
+        outfile = os.path.join(tempdir, "health.csv")
+        result = runner.invoke(
+            cli,
+            [
+                "--zip",
+                "--format",
+                "csv",
+                "--output",
+                outfile,
+                "stream",
+                infile,
+            ],
+        )
+        assert result.exit_code == 0, f"Output: {result.output}"
+
 
 def test_cli_quiet():
     with TemporaryDirectory() as tempdir:
-        infile = os.path.join(testdir, 'blank.pdf')
-        outfile = os.path.join(tempdir, 'blank.csv')
+        infile = os.path.join(testdir, "empty.pdf")
+        outfile = os.path.join(tempdir, "empty.csv")
         runner = CliRunner()
 
-        result = runner.invoke(cli, ['--format', 'csv', '--output', outfile,
-                                     'stream', infile])
-        assert 'No tables found on page-1' in result.output
+        result = runner.invoke(
+            cli, ["--format", "csv", "--output", outfile, "stream", infile]
+        )
+        assert "No tables found on page-1" in result.output
 
-        result = runner.invoke(cli, ['--quiet', '--format', 'csv',
-                                     '--output', outfile, 'stream', infile])
-        assert 'No tables found on page-1' not in result.output
+        result = runner.invoke(
+            cli, ["--quiet", "--format", "csv", "--output", outfile, "stream", infile]
+        )
+        assert "No tables found on page-1" not in result.output

tests/test_common.py

@@ -1,24 +1,47 @@
 # -*- coding: utf-8 -*-
 
 import os
+import sys
 
+import pytest
 import pandas as pd
+from pandas.testing import assert_frame_equal
 
 import camelot
+from camelot.io import PDFHandler
+from camelot.core import Table, TableList
+from camelot.__version__ import generate_version
+from camelot.backends import ImageConversionBackend
 
 from .data import *
 
 testdir = os.path.dirname(os.path.abspath(__file__))
 testdir = os.path.join(testdir, "files")
 
+skip_on_windows = pytest.mark.skipif(
+    sys.platform.startswith("win"),
+    reason="Ghostscript not installed in Windows test environment",
+)
 
+
+def test_version_generation():
+    version = (0, 7, 3)
+    assert generate_version(version, prerelease=None, revision=None) == "0.7.3"
+
+
+def test_version_generation_with_prerelease_revision():
+    version = (0, 7, 3)
+    prerelease = "alpha"
+    revision = 2
+    assert (
+        generate_version(version, prerelease=prerelease, revision=revision)
+        == "0.7.3-alpha.2"
+    )
+
+
+@skip_on_windows
 def test_parsing_report():
-    parsing_report = {
-        'accuracy': 99.02,
-        'whitespace': 12.24,
-        'order': 1,
-        'page': 1
-    }
+    parsing_report = {"accuracy": 99.02, "whitespace": 12.24, "order": 1, "page": 1}
 
     filename = os.path.join(testdir, "foo.pdf")
     tables = camelot.read_pdf(filename)
@@ -30,220 +53,122 @@ def test_password():
 
     filename = os.path.join(testdir, "health_protected.pdf")
     tables = camelot.read_pdf(filename, password="ownerpass", flavor="stream")
-    assert df.equals(tables[0].df)
+    assert_frame_equal(df, tables[0].df)
 
     tables = camelot.read_pdf(filename, password="userpass", flavor="stream")
-    assert df.equals(tables[0].df)
+    assert_frame_equal(df, tables[0].df)
 
 
-def test_stream():
-    df = pd.DataFrame(data_stream)
-
-    filename = os.path.join(testdir, "health.pdf")
-    tables = camelot.read_pdf(filename, flavor="stream")
-    assert df.equals(tables[0].df)
-
-
-def test_stream_table_rotated():
-    df = pd.DataFrame(data_stream_table_rotated)
-
-    filename = os.path.join(testdir, "clockwise_table_2.pdf")
-    tables = camelot.read_pdf(filename, flavor="stream")
-    assert df.equals(tables[0].df)
-
-    filename = os.path.join(testdir, "anticlockwise_table_2.pdf")
-    tables = camelot.read_pdf(filename, flavor="stream")
-    assert df.equals(tables[0].df)
-
-
-def test_stream_two_tables():
-    df1 = pd.DataFrame(data_stream_two_tables_1)
-    df2 = pd.DataFrame(data_stream_two_tables_2)
-
-    filename = os.path.join(testdir, "tabula/12s0324.pdf")
-    tables = camelot.read_pdf(filename, flavor='stream')
-
-    assert len(tables) == 2
-    assert df1.equals(tables[0].df)
-    assert df2.equals(tables[1].df)
-
-
-def test_stream_table_areas():
-    df = pd.DataFrame(data_stream_table_areas)
-
-    filename = os.path.join(testdir, "tabula/us-007.pdf")
-    tables = camelot.read_pdf(filename, flavor="stream", table_areas=["320,500,573,335"])
-    assert df.equals(tables[0].df)
-
-
-def test_stream_columns():
-    df = pd.DataFrame(data_stream_columns)
-
-    filename = os.path.join(testdir, "mexican_towns.pdf")
-    tables = camelot.read_pdf(
-        filename, flavor="stream", columns=["67,180,230,425,475"], row_tol=10)
-    assert df.equals(tables[0].df)
-
-
-def test_stream_split_text():
-    df = pd.DataFrame(data_stream_split_text)
-
-    filename = os.path.join(testdir, "tabula/m27.pdf")
-    tables = camelot.read_pdf(
-        filename, flavor="stream", columns=["72,95,209,327,442,529,566,606,683"], split_text=True)
-    assert df.equals(tables[0].df)
-
-
-def test_stream_flag_size():
-    df = pd.DataFrame(data_stream_flag_size)
-
-    filename = os.path.join(testdir, "superscript.pdf")
-    tables = camelot.read_pdf(filename, flavor="stream", flag_size=True)
-    assert df.equals(tables[0].df)
-
-
-def test_stream_strip_text():
-    df = pd.DataFrame(data_stream_strip_text)
-
-    filename = os.path.join(testdir, "detect_vertical_false.pdf")
-    tables = camelot.read_pdf(filename, flavor="stream", strip_text="\n")
-    assert df.equals(tables[0].df)
-
-
-def test_stream_edge_tol():
-    df = pd.DataFrame(data_stream_edge_tol)
-
-    filename = os.path.join(testdir, "edge_tol.pdf")
-    tables = camelot.read_pdf(filename, flavor="stream", edge_tol=500)
-    assert df.equals(tables[0].df)
-
-
-def test_stream_layout_kwargs():
-    df = pd.DataFrame(data_stream_layout_kwargs)
-
-    filename = os.path.join(testdir, "detect_vertical_false.pdf")
-    tables = camelot.read_pdf(
-        filename, flavor="stream", layout_kwargs={"detect_vertical": False})
-    assert df.equals(tables[0].df)
-
-
-def test_lattice():
-    df = pd.DataFrame(data_lattice)
-
-    filename = os.path.join(
-        testdir, "tabula/icdar2013-dataset/competition-dataset-us/us-030.pdf")
-    tables = camelot.read_pdf(filename, pages="2")
-    assert df.equals(tables[0].df)
-
-
-def test_lattice_table_rotated():
-    df = pd.DataFrame(data_lattice_table_rotated)
-
-    filename = os.path.join(testdir, "clockwise_table_1.pdf")
-    tables = camelot.read_pdf(filename)
-    assert df.equals(tables[0].df)
-
-    filename = os.path.join(testdir, "anticlockwise_table_1.pdf")
-    tables = camelot.read_pdf(filename)
-    assert df.equals(tables[0].df)
-
-
-def test_lattice_two_tables():
-    df1 = pd.DataFrame(data_lattice_two_tables_1)
-    df2 = pd.DataFrame(data_lattice_two_tables_2)
-
-    filename = os.path.join(testdir, "twotables_2.pdf")
-    tables = camelot.read_pdf(filename)
-    assert len(tables) == 2
-    assert df1.equals(tables[0].df)
-    assert df2.equals(tables[1].df)
-
-
-def test_lattice_table_regions():
-    df = pd.DataFrame(data_lattice_table_regions)
-
-    filename = os.path.join(testdir, "table_region.pdf")
-    tables = camelot.read_pdf(filename, table_regions=["170,370,560,270"])
-    assert df.equals(tables[0].df)
-
-
-def test_lattice_table_areas():
-    df = pd.DataFrame(data_lattice_table_areas)
-
-    filename = os.path.join(testdir, "twotables_2.pdf")
-    tables = camelot.read_pdf(filename, table_areas=["80,693,535,448"])
-    assert df.equals(tables[0].df)
-
-
-def test_lattice_process_background():
-    df = pd.DataFrame(data_lattice_process_background)
-
-    filename = os.path.join(testdir, "background_lines_1.pdf")
-    tables = camelot.read_pdf(filename, process_background=True)
-    assert df.equals(tables[1].df)
-
-
-def test_lattice_copy_text():
-    df = pd.DataFrame(data_lattice_copy_text)
-
-    filename = os.path.join(testdir, "row_span_1.pdf")
-    tables = camelot.read_pdf(filename, line_scale=60, copy_text="v")
-    assert df.equals(tables[0].df)
-
-
-def test_lattice_shift_text():
-    df_lt = pd.DataFrame(data_lattice_shift_text_left_top)
-    df_disable = pd.DataFrame(data_lattice_shift_text_disable)
-    df_rb = pd.DataFrame(data_lattice_shift_text_right_bottom)
-
-    filename = os.path.join(testdir, "column_span_2.pdf")
-    tables = camelot.read_pdf(filename, line_scale=40)
-    assert df_lt.equals(tables[0].df)
-
-    tables = camelot.read_pdf(filename, line_scale=40, shift_text=[''])
-    assert df_disable.equals(tables[0].df)
-
-    tables = camelot.read_pdf(filename, line_scale=40, shift_text=['r', 'b'])
-    assert df_rb.equals(tables[0].df)
-
-
-def test_repr():
+def test_repr_poppler():
     filename = os.path.join(testdir, "foo.pdf")
-    tables = camelot.read_pdf(filename)
+    tables = camelot.read_pdf(filename, backend="poppler")
     assert repr(tables) == "<TableList n=1>"
     assert repr(tables[0]) == "<Table shape=(7, 7)>"
-    assert repr(tables[0].cells[0][0]) == "<Cell x1=120.48 y1=218.43 x2=164.64 y2=233.77>"
+    assert repr(tables[0].cells[0][0]) == "<Cell x1=120 y1=219 x2=165 y2=234>"
 
 
-def test_pages():
+@skip_on_windows
+def test_repr_ghostscript():
+    filename = os.path.join(testdir, "foo.pdf")
+    tables = camelot.read_pdf(filename, backend="ghostscript")
+    assert repr(tables) == "<TableList n=1>"
+    assert repr(tables[0]) == "<Table shape=(7, 7)>"
+    assert repr(tables[0].cells[0][0]) == "<Cell x1=120 y1=218 x2=165 y2=234>"
+
+
+def test_url_poppler():
     url = "https://camelot-py.readthedocs.io/en/master/_static/pdf/foo.pdf"
-    tables = camelot.read_pdf(url)
+    tables = camelot.read_pdf(url, backend="poppler")
     assert repr(tables) == "<TableList n=1>"
     assert repr(tables[0]) == "<Table shape=(7, 7)>"
-    assert repr(tables[0].cells[0][0]) == "<Cell x1=120.48 y1=218.43 x2=164.64 y2=233.77>"
-
-    tables = camelot.read_pdf(url, pages='1-end')
-    assert repr(tables) == "<TableList n=1>"
-    assert repr(tables[0]) == "<Table shape=(7, 7)>"
-    assert repr(tables[0].cells[0][0]) == "<Cell x1=120.48 y1=218.43 x2=164.64 y2=233.77>"
-
-    tables = camelot.read_pdf(url, pages='all')
-    assert repr(tables) == "<TableList n=1>"
-    assert repr(tables[0]) == "<Table shape=(7, 7)>"
-    assert repr(tables[0].cells[0][0]) == "<Cell x1=120.48 y1=218.43 x2=164.64 y2=233.77>"
+    assert repr(tables[0].cells[0][0]) == "<Cell x1=120 y1=219 x2=165 y2=234>"
 
 
-def test_url():
+@skip_on_windows
+def test_url_ghostscript():
     url = "https://camelot-py.readthedocs.io/en/master/_static/pdf/foo.pdf"
-    tables = camelot.read_pdf(url)
+    tables = camelot.read_pdf(url, backend="ghostscript")
     assert repr(tables) == "<TableList n=1>"
     assert repr(tables[0]) == "<Table shape=(7, 7)>"
-    assert repr(tables[0].cells[0][0]) == "<Cell x1=120.48 y1=218.43 x2=164.64 y2=233.77>"
+    assert repr(tables[0].cells[0][0]) == "<Cell x1=120 y1=218 x2=165 y2=234>"
 
 
-def test_arabic():
-    df = pd.DataFrame(data_arabic)
+def test_pages_poppler():
+    url = "https://camelot-py.readthedocs.io/en/master/_static/pdf/foo.pdf"
+    tables = camelot.read_pdf(url, backend="poppler")
+    assert repr(tables) == "<TableList n=1>"
+    assert repr(tables[0]) == "<Table shape=(7, 7)>"
+    assert repr(tables[0].cells[0][0]) == "<Cell x1=120 y1=219 x2=165 y2=234>"
 
-    filename = os.path.join(testdir, "tabula/arabic.pdf")
-    tables = camelot.read_pdf(filename)
-    assert df.equals(tables[0].df)
+    tables = camelot.read_pdf(url, pages="1-end", backend="poppler")
+    assert repr(tables) == "<TableList n=1>"
+    assert repr(tables[0]) == "<Table shape=(7, 7)>"
+    assert repr(tables[0].cells[0][0]) == "<Cell x1=120 y1=219 x2=165 y2=234>"
+
+    tables = camelot.read_pdf(url, pages="all", backend="poppler")
+    assert repr(tables) == "<TableList n=1>"
+    assert repr(tables[0]) == "<Table shape=(7, 7)>"
+    assert repr(tables[0].cells[0][0]) == "<Cell x1=120 y1=219 x2=165 y2=234>"
+
+
+@skip_on_windows
+def test_pages_ghostscript():
+    url = "https://camelot-py.readthedocs.io/en/master/_static/pdf/foo.pdf"
+    tables = camelot.read_pdf(url, backend="ghostscript")
+    assert repr(tables) == "<TableList n=1>"
+    assert repr(tables[0]) == "<Table shape=(7, 7)>"
+    assert repr(tables[0].cells[0][0]) == "<Cell x1=120 y1=218 x2=165 y2=234>"
+
+    tables = camelot.read_pdf(url, pages="1-end", backend="ghostscript")
+    assert repr(tables) == "<TableList n=1>"
+    assert repr(tables[0]) == "<Table shape=(7, 7)>"
+    assert repr(tables[0].cells[0][0]) == "<Cell x1=120 y1=218 x2=165 y2=234>"
+
+    tables = camelot.read_pdf(url, pages="all", backend="ghostscript")
+    assert repr(tables) == "<TableList n=1>"
+    assert repr(tables[0]) == "<Table shape=(7, 7)>"
+    assert repr(tables[0].cells[0][0]) == "<Cell x1=120 y1=218 x2=165 y2=234>"
+
+
+def test_table_order():
+    def _make_table(page, order):
+        t = Table([], [])
+        t.page = page
+        t.order = order
+        return t
+
+    table_list = TableList(
+        [_make_table(2, 1), _make_table(1, 1), _make_table(3, 4), _make_table(1, 2)]
+    )
+
+    assert [(t.page, t.order) for t in sorted(table_list)] == [
+        (1, 1),
+        (1, 2),
+        (2, 1),
+        (3, 4),
+    ]
+    assert [(t.page, t.order) for t in sorted(table_list, reverse=True)] == [
+        (3, 4),
+        (2, 1),
+        (1, 2),
+        (1, 1),
+    ]
+
+
+def test_handler_pages_generator():
+    filename = os.path.join(testdir, "foo.pdf")
+
+    handler = PDFHandler(filename)
+    assert handler._get_pages("1") == [1]
+
+    handler = PDFHandler(filename)
+    assert handler._get_pages("all") == [1]
+
+    handler = PDFHandler(filename)
+    assert handler._get_pages("1-end") == [1]
+
+    handler = PDFHandler(filename)
+    assert handler._get_pages("1,2,3,4") == [1, 2, 3, 4]
+
+    handler = PDFHandler(filename)
+    assert handler._get_pages("1,2,5-10") == [1, 2, 5, 6, 7, 8, 9, 10]

tests/test_errors.py

@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 
 import os
+import sys
 import warnings
 
 import pytest
@@ -10,88 +11,145 @@ import camelot
 
 testdir = os.path.dirname(os.path.abspath(__file__))
 testdir = os.path.join(testdir, "files")
-filename = os.path.join(testdir, 'foo.pdf')
+filename = os.path.join(testdir, "foo.pdf")
+
+skip_on_windows = pytest.mark.skipif(
+    sys.platform.startswith("win"),
+    reason="Ghostscript not installed in Windows test environment",
+)
 
 
 def test_unknown_flavor():
-    message = ("Unknown flavor specified."
-               " Use either 'lattice' or 'stream'")
-    with pytest.raises(NotImplementedError, message=message):
-        tables = camelot.read_pdf(filename, flavor='chocolate')
+    message = "Unknown flavor specified." " Use either 'lattice' or 'stream'"
+    with pytest.raises(NotImplementedError, match=message):
+        tables = camelot.read_pdf(filename, flavor="chocolate")
 
 
 def test_input_kwargs():
     message = "columns cannot be used with flavor='lattice'"
-    with pytest.raises(ValueError, message=message):
-        tables = camelot.read_pdf(filename, columns=['10,20,30,40'])
+    with pytest.raises(ValueError, match=message):
+        tables = camelot.read_pdf(filename, columns=["10,20,30,40"])
 
 
 def test_unsupported_format():
-    message = 'File format not supported'
-    filename = os.path.join(testdir, 'foo.csv')
-    with pytest.raises(NotImplementedError, message=message):
+    message = "File format not supported"
+    filename = os.path.join(testdir, "foo.csv")
+    with pytest.raises(NotImplementedError, match=message):
         tables = camelot.read_pdf(filename)
 
 
-def test_stream_equal_length():
-    message = ("Length of table_areas and columns"
-               " should be equal")
-    with pytest.raises(ValueError, message=message):
-        tables = camelot.read_pdf(filename, flavor='stream',
-            table_areas=['10,20,30,40'], columns=['10,20,30,40', '10,20,30,40'])
-
-
-def test_image_warning():
-    filename = os.path.join(testdir, 'image.pdf')
-    with warnings.catch_warnings():
-        warnings.simplefilter('error')
-        with pytest.raises(UserWarning) as e:
-            tables = camelot.read_pdf(filename)
-        assert str(e.value) == 'page-1 is image-based, camelot only works on text-based pages.'
-
-
-def test_no_tables_found():
-    filename = os.path.join(testdir, 'blank.pdf')
-    with warnings.catch_warnings():
-        warnings.simplefilter('error')
-        with pytest.raises(UserWarning) as e:
-            tables = camelot.read_pdf(filename)
-        assert str(e.value) == 'No tables found on page-1'
-
-
+@skip_on_windows
 def test_no_tables_found_logs_suppressed():
-    filename = os.path.join(testdir, 'foo.pdf')
+    filename = os.path.join(testdir, "foo.pdf")
     with warnings.catch_warnings():
         # the test should fail if any warning is thrown
-        warnings.simplefilter('error')
+        warnings.simplefilter("error")
         try:
             tables = camelot.read_pdf(filename, suppress_stdout=True)
         except Warning as e:
             warning_text = str(e)
-            pytest.fail('Unexpected warning: {}'.format(warning_text))
+            pytest.fail(f"Unexpected warning: {warning_text}")
 
 
 def test_no_tables_found_warnings_suppressed():
-    filename = os.path.join(testdir, 'blank.pdf')
+    filename = os.path.join(testdir, "empty.pdf")
     with warnings.catch_warnings():
         # the test should fail if any warning is thrown
-        warnings.simplefilter('error')
+        warnings.simplefilter("error")
         try:
             tables = camelot.read_pdf(filename, suppress_stdout=True)
         except Warning as e:
             warning_text = str(e)
-            pytest.fail('Unexpected warning: {}'.format(warning_text))
+            pytest.fail(f"Unexpected warning: {warning_text}")
 
 
 def test_no_password():
-    filename = os.path.join(testdir, 'health_protected.pdf')
-    message = 'file has not been decrypted'
-    with pytest.raises(Exception, message=message):
+    filename = os.path.join(testdir, "health_protected.pdf")
+    message = "file has not been decrypted"
+    with pytest.raises(Exception, match=message):
         tables = camelot.read_pdf(filename)
 
 
 def test_bad_password():
-    filename = os.path.join(testdir, 'health_protected.pdf')
-    message = 'file has not been decrypted'
-    with pytest.raises(Exception, message=message):
-        tables = camelot.read_pdf(filename, password='wrongpass')
+    filename = os.path.join(testdir, "health_protected.pdf")
+    message = "file has not been decrypted"
+    with pytest.raises(Exception, match=message):
+        tables = camelot.read_pdf(filename, password="wrongpass")
+
+
+def test_stream_equal_length():
+    message = "Length of table_areas and columns" " should be equal"
+    with pytest.raises(ValueError, match=message):
+        tables = camelot.read_pdf(
+            filename,
+            flavor="stream",
+            table_areas=["10,20,30,40"],
+            columns=["10,20,30,40", "10,20,30,40"],
+        )
+
+
+def test_image_warning():
+    filename = os.path.join(testdir, "image.pdf")
+    with warnings.catch_warnings():
+        warnings.simplefilter("error", category=UserWarning)
+        with pytest.raises(UserWarning) as e:
+            tables = camelot.read_pdf(filename)
+            assert (
+                str(e.value)
+                == "page-1 is image-based, camelot only works on text-based pages."
+            )
+
+
+def test_stream_no_tables_on_page():
+    filename = os.path.join(testdir, "empty.pdf")
+    with warnings.catch_warnings():
+        warnings.simplefilter("error")
+        with pytest.raises(UserWarning) as e:
+            tables = camelot.read_pdf(filename, flavor="stream")
+        assert str(e.value) == "No tables found on page-1"
+
+
+def test_stream_no_tables_in_area():
+    filename = os.path.join(testdir, "only_page_number.pdf")
+    with warnings.catch_warnings():
+        warnings.simplefilter("error")
+        with pytest.raises(UserWarning) as e:
+            tables = camelot.read_pdf(filename, flavor="stream")
+        assert str(e.value) == "No tables found in table area 1"
+
+
+def test_lattice_no_tables_on_page():
+    filename = os.path.join(testdir, "empty.pdf")
+    with warnings.catch_warnings():
+        warnings.simplefilter("error", category=UserWarning)
+        with pytest.raises(UserWarning) as e:
+            tables = camelot.read_pdf(filename, flavor="lattice")
+        assert str(e.value) == "No tables found on page-1"
+
+
+def test_lattice_unknown_backend():
+    message = "Unknown backend 'mupdf' specified. Please use either 'poppler' or 'ghostscript'."
+    with pytest.raises(NotImplementedError, match=message):
+        tables = camelot.read_pdf(filename, backend="mupdf")
+
+
+def test_lattice_no_convert_method():
+    class ConversionBackend(object):
+        pass
+
+    message = "must implement a 'convert' method"
+    with pytest.raises(NotImplementedError, match=message):
+        tables = camelot.read_pdf(filename, backend=ConversionBackend())
+
+
+def test_lattice_ghostscript_deprecation_warning():
+    ghostscript_deprecation_warning = (
+        "'ghostscript' will be replaced by 'poppler' as the default image conversion"
+        " backend in v0.12.0. You can try out 'poppler' with backend='poppler'."
+    )
+
+    with warnings.catch_warnings():
+        warnings.simplefilter("error")
+        with pytest.raises(DeprecationWarning) as e:
+            tables = camelot.read_pdf(filename)
+            assert str(e.value) == ghostscript_deprecation_warning

tests/test_image_conversion_backend.py

@@ -0,0 +1,60 @@
+# -*- coding: utf-8 -*-
+
+import pytest
+
+import camelot.backends.image_conversion
+from camelot.backends import ImageConversionBackend
+
+
+class PopplerBackendError(object):
+    def convert(self, pdf_path, png_path):
+        raise ValueError("Image conversion failed")
+
+
+class GhostscriptBackendError(object):
+    def convert(self, pdf_path, png_path):
+        raise ValueError("Image conversion failed")
+
+
+class GhostscriptBackendNoError(object):
+    def convert(self, pdf_path, png_path):
+        pass
+
+
+def test_poppler_backend_error_when_no_use_fallback(monkeypatch):
+    BACKENDS = {
+        "poppler": PopplerBackendError,
+        "ghostscript": GhostscriptBackendNoError,
+    }
+    monkeypatch.setattr(
+        "camelot.backends.image_conversion.BACKENDS", BACKENDS, raising=True
+    )
+    backend = ImageConversionBackend(use_fallback=False)
+
+    message = "Image conversion failed with image conversion backend 'poppler'"
+    with pytest.raises(ValueError, match=message):
+        backend.convert("foo", "bar")
+
+
+def test_ghostscript_backend_when_use_fallback(monkeypatch):
+    BACKENDS = {
+        "poppler": PopplerBackendError,
+        "ghostscript": GhostscriptBackendNoError,
+    }
+    monkeypatch.setattr(
+        "camelot.backends.image_conversion.BACKENDS", BACKENDS, raising=True
+    )
+    backend = ImageConversionBackend()
+    backend.convert("foo", "bar")
+
+
+def test_ghostscript_backend_error_when_use_fallback(monkeypatch):
+    BACKENDS = {"poppler": PopplerBackendError, "ghostscript": GhostscriptBackendError}
+    monkeypatch.setattr(
+        "camelot.backends.image_conversion.BACKENDS", BACKENDS, raising=True
+    )
+    backend = ImageConversionBackend()
+
+    message = "Image conversion failed with image conversion backend 'ghostscript'"
+    with pytest.raises(ValueError, match=message):
+        backend.convert("foo", "bar")

tests/test_lattice.py

@@ -0,0 +1,120 @@
+# -*- coding: utf-8 -*-
+
+import os
+import sys
+
+import pytest
+import pandas as pd
+from pandas.testing import assert_frame_equal
+
+import camelot
+from camelot.core import Table, TableList
+from camelot.__version__ import generate_version
+
+from .data import *
+
+testdir = os.path.dirname(os.path.abspath(__file__))
+testdir = os.path.join(testdir, "files")
+
+skip_on_windows = pytest.mark.skipif(
+    sys.platform.startswith("win"),
+    reason="Ghostscript not installed in Windows test environment",
+)
+
+
+@skip_on_windows
+def test_lattice():
+    df = pd.DataFrame(data_lattice)
+
+    filename = os.path.join(
+        testdir, "tabula/icdar2013-dataset/competition-dataset-us/us-030.pdf"
+    )
+    tables = camelot.read_pdf(filename, pages="2")
+    assert_frame_equal(df, tables[0].df)
+
+
+@skip_on_windows
+def test_lattice_table_rotated():
+    df = pd.DataFrame(data_lattice_table_rotated)
+
+    filename = os.path.join(testdir, "clockwise_table_1.pdf")
+    tables = camelot.read_pdf(filename)
+    assert_frame_equal(df, tables[0].df)
+
+    filename = os.path.join(testdir, "anticlockwise_table_1.pdf")
+    tables = camelot.read_pdf(filename)
+    assert_frame_equal(df, tables[0].df)
+
+
+@skip_on_windows
+def test_lattice_two_tables():
+    df1 = pd.DataFrame(data_lattice_two_tables_1)
+    df2 = pd.DataFrame(data_lattice_two_tables_2)
+
+    filename = os.path.join(testdir, "twotables_2.pdf")
+    tables = camelot.read_pdf(filename)
+    assert len(tables) == 2
+    assert df1.equals(tables[0].df)
+    assert df2.equals(tables[1].df)
+
+
+@skip_on_windows
+def test_lattice_table_regions():
+    df = pd.DataFrame(data_lattice_table_regions)
+
+    filename = os.path.join(testdir, "table_region.pdf")
+    tables = camelot.read_pdf(filename, table_regions=["170,370,560,270"])
+    assert_frame_equal(df, tables[0].df)
+
+
+@skip_on_windows
+def test_lattice_table_areas():
+    df = pd.DataFrame(data_lattice_table_areas)
+
+    filename = os.path.join(testdir, "twotables_2.pdf")
+    tables = camelot.read_pdf(filename, table_areas=["80,693,535,448"])
+    assert_frame_equal(df, tables[0].df)
+
+
+@skip_on_windows
+def test_lattice_process_background():
+    df = pd.DataFrame(data_lattice_process_background)
+
+    filename = os.path.join(testdir, "background_lines_1.pdf")
+    tables = camelot.read_pdf(filename, process_background=True)
+    assert_frame_equal(df, tables[1].df)
+
+
+@skip_on_windows
+def test_lattice_copy_text():
+    df = pd.DataFrame(data_lattice_copy_text)
+
+    filename = os.path.join(testdir, "row_span_1.pdf")
+    tables = camelot.read_pdf(filename, line_scale=60, copy_text="v")
+    assert_frame_equal(df, tables[0].df)
+
+
+@skip_on_windows
+def test_lattice_shift_text():
+    df_lt = pd.DataFrame(data_lattice_shift_text_left_top)
+    df_disable = pd.DataFrame(data_lattice_shift_text_disable)
+    df_rb = pd.DataFrame(data_lattice_shift_text_right_bottom)
+
+    filename = os.path.join(testdir, "column_span_2.pdf")
+    tables = camelot.read_pdf(filename, line_scale=40)
+    assert df_lt.equals(tables[0].df)
+
+    tables = camelot.read_pdf(filename, line_scale=40, shift_text=[""])
+    assert df_disable.equals(tables[0].df)
+
+    tables = camelot.read_pdf(filename, line_scale=40, shift_text=["r", "b"])
+    assert df_rb.equals(tables[0].df)
+
+
+@skip_on_windows
+def test_lattice_arabic():
+    df = pd.DataFrame(data_arabic)
+
+    filename = os.path.join(testdir, "tabula/arabic.pdf")
+    tables = camelot.read_pdf(filename)
+    assert_frame_equal(df, tables[0].df)

tests/test_plotting.py

@@ -1,67 +1,98 @@
 # -*- coding: utf-8 -*-
 
 import os
+import sys
 
 import pytest
 
 import camelot
 
-
 testdir = os.path.dirname(os.path.abspath(__file__))
 testdir = os.path.join(testdir, "files")
 
+skip_on_windows = pytest.mark.skipif(
+    sys.platform.startswith("win"),
+    reason="Ghostscript not installed in Windows test environment",
+)
 
-@pytest.mark.mpl_image_compare(
-    baseline_dir="files/baseline_plots", remove_text=True)
+
+@skip_on_windows
+@pytest.mark.mpl_image_compare(baseline_dir="files/baseline_plots", remove_text=True)
 def test_text_plot():
     filename = os.path.join(testdir, "foo.pdf")
     tables = camelot.read_pdf(filename)
-    return camelot.plot(tables[0], kind='text')
+    return camelot.plot(tables[0], kind="text")
 
 
-@pytest.mark.mpl_image_compare(
-    baseline_dir="files/baseline_plots", remove_text=True)
-def test_grid_plot():
-    filename = os.path.join(testdir, "foo.pdf")
-    tables = camelot.read_pdf(filename)
-    return camelot.plot(tables[0], kind='grid')
-
-
-@pytest.mark.mpl_image_compare(
-    baseline_dir="files/baseline_plots", remove_text=True)
-def test_lattice_contour_plot():
-    filename = os.path.join(testdir, "foo.pdf")
-    tables = camelot.read_pdf(filename)
-    return camelot.plot(tables[0], kind='contour')
-
-
-@pytest.mark.mpl_image_compare(
-    baseline_dir="files/baseline_plots", remove_text=True)
-def test_stream_contour_plot():
-    filename = os.path.join(testdir, "tabula/12s0324.pdf")
-    tables = camelot.read_pdf(filename, flavor='stream')
-    return camelot.plot(tables[0], kind='contour')
-
-
-@pytest.mark.mpl_image_compare(
-    baseline_dir="files/baseline_plots", remove_text=True)
-def test_line_plot():
-    filename = os.path.join(testdir, "foo.pdf")
-    tables = camelot.read_pdf(filename)
-    return camelot.plot(tables[0], kind='line')
-
-
-@pytest.mark.mpl_image_compare(
-    baseline_dir="files/baseline_plots", remove_text=True)
-def test_joint_plot():
-    filename = os.path.join(testdir, "foo.pdf")
-    tables = camelot.read_pdf(filename)
-    return camelot.plot(tables[0], kind='joint')
-
-
-@pytest.mark.mpl_image_compare(
-    baseline_dir="files/baseline_plots", remove_text=True)
+@pytest.mark.mpl_image_compare(baseline_dir="files/baseline_plots", remove_text=True)
 def test_textedge_plot():
     filename = os.path.join(testdir, "tabula/12s0324.pdf")
-    tables = camelot.read_pdf(filename, flavor='stream')
-    return camelot.plot(tables[0], kind='textedge')
+    tables = camelot.read_pdf(filename, flavor="stream")
+    return camelot.plot(tables[0], kind="textedge")
+
+
+@pytest.mark.mpl_image_compare(baseline_dir="files/baseline_plots", remove_text=True)
+def test_lattice_contour_plot_poppler():
+    filename = os.path.join(testdir, "foo.pdf")
+    tables = camelot.read_pdf(filename, backend="poppler")
+    return camelot.plot(tables[0], kind="contour")
+
+
+@skip_on_windows
+@pytest.mark.mpl_image_compare(baseline_dir="files/baseline_plots", remove_text=True)
+def test_lattice_contour_plot_ghostscript():
+    filename = os.path.join(testdir, "foo.pdf")
+    tables = camelot.read_pdf(filename, backend="ghostscript")
+    return camelot.plot(tables[0], kind="contour")
+
+
+@pytest.mark.mpl_image_compare(baseline_dir="files/baseline_plots", remove_text=True)
+def test_stream_contour_plot():
+    filename = os.path.join(testdir, "tabula/12s0324.pdf")
+    tables = camelot.read_pdf(filename, flavor="stream")
+    return camelot.plot(tables[0], kind="contour")
+
+
+@pytest.mark.mpl_image_compare(baseline_dir="files/baseline_plots", remove_text=True)
+def test_line_plot_poppler():
+    filename = os.path.join(testdir, "foo.pdf")
+    tables = camelot.read_pdf(filename, backend="poppler")
+    return camelot.plot(tables[0], kind="line")
+
+
+@skip_on_windows
+@pytest.mark.mpl_image_compare(baseline_dir="files/baseline_plots", remove_text=True)
+def test_line_plot_ghostscript():
+    filename = os.path.join(testdir, "foo.pdf")
+    tables = camelot.read_pdf(filename, backend="ghostscript")
+    return camelot.plot(tables[0], kind="line")
+
+
+@pytest.mark.mpl_image_compare(baseline_dir="files/baseline_plots", remove_text=True)
+def test_joint_plot_poppler():
+    filename = os.path.join(testdir, "foo.pdf")
+    tables = camelot.read_pdf(filename, backend="poppler")
+    return camelot.plot(tables[0], kind="joint")
+
+
+@skip_on_windows
+@pytest.mark.mpl_image_compare(baseline_dir="files/baseline_plots", remove_text=True)
+def test_joint_plot_ghostscript():
+    filename = os.path.join(testdir, "foo.pdf")
+    tables = camelot.read_pdf(filename, backend="ghostscript")
+    return camelot.plot(tables[0], kind="joint")
+
+
+@pytest.mark.mpl_image_compare(baseline_dir="files/baseline_plots", remove_text=True)
+def test_grid_plot_poppler():
+    filename = os.path.join(testdir, "foo.pdf")
+    tables = camelot.read_pdf(filename, backend="poppler")
+    return camelot.plot(tables[0], kind="grid")
+
+
+@skip_on_windows
+@pytest.mark.mpl_image_compare(baseline_dir="files/baseline_plots", remove_text=True)
+def test_grid_plot_ghostscript():
+    filename = os.path.join(testdir, "foo.pdf")
+    tables = camelot.read_pdf(filename, backend="ghostscript")
+    return camelot.plot(tables[0], kind="grid")

tests/test_stream.py

@@ -0,0 +1,133 @@
+# -*- coding: utf-8 -*-
+
+import os
+
+import pytest
+import pandas as pd
+from pandas.testing import assert_frame_equal
+
+import camelot
+from camelot.core import Table, TableList
+from camelot.__version__ import generate_version
+
+from .data import *
+
+testdir = os.path.dirname(os.path.abspath(__file__))
+testdir = os.path.join(testdir, "files")
+
+
+def test_stream():
+    df = pd.DataFrame(data_stream)
+
+    filename = os.path.join(testdir, "health.pdf")
+    tables = camelot.read_pdf(filename, flavor="stream")
+    assert_frame_equal(df, tables[0].df)
+
+
+def test_stream_table_rotated():
+    df = pd.DataFrame(data_stream_table_rotated)
+
+    filename = os.path.join(testdir, "clockwise_table_2.pdf")
+    tables = camelot.read_pdf(filename, flavor="stream")
+    assert_frame_equal(df, tables[0].df)
+
+    filename = os.path.join(testdir, "anticlockwise_table_2.pdf")
+    tables = camelot.read_pdf(filename, flavor="stream")
+    assert_frame_equal(df, tables[0].df)
+
+
+def test_stream_two_tables():
+    df1 = pd.DataFrame(data_stream_two_tables_1)
+    df2 = pd.DataFrame(data_stream_two_tables_2)
+
+    filename = os.path.join(testdir, "tabula/12s0324.pdf")
+    tables = camelot.read_pdf(filename, flavor="stream")
+
+    assert len(tables) == 2
+    assert df1.equals(tables[0].df)
+    assert df2.equals(tables[1].df)
+
+
+def test_stream_table_regions():
+    df = pd.DataFrame(data_stream_table_areas)
+
+    filename = os.path.join(testdir, "tabula/us-007.pdf")
+    tables = camelot.read_pdf(
+        filename, flavor="stream", table_regions=["320,460,573,335"]
+    )
+    assert_frame_equal(df, tables[0].df)
+
+
+def test_stream_table_areas():
+    df = pd.DataFrame(data_stream_table_areas)
+
+    filename = os.path.join(testdir, "tabula/us-007.pdf")
+    tables = camelot.read_pdf(
+        filename, flavor="stream", table_areas=["320,500,573,335"]
+    )
+    assert_frame_equal(df, tables[0].df)
+
+
+def test_stream_columns():
+    df = pd.DataFrame(data_stream_columns)
+
+    filename = os.path.join(testdir, "mexican_towns.pdf")
+    tables = camelot.read_pdf(
+        filename, flavor="stream", columns=["67,180,230,425,475"], row_tol=10
+    )
+    assert_frame_equal(df, tables[0].df)
+
+
+def test_stream_split_text():
+    df = pd.DataFrame(data_stream_split_text)
+
+    filename = os.path.join(testdir, "tabula/m27.pdf")
+    tables = camelot.read_pdf(
+        filename,
+        flavor="stream",
+        columns=["72,95,209,327,442,529,566,606,683"],
+        split_text=True,
+    )
+    assert_frame_equal(df, tables[0].df)
+
+
+def test_stream_flag_size():
+    df = pd.DataFrame(data_stream_flag_size)
+
+    filename = os.path.join(testdir, "superscript.pdf")
+    tables = camelot.read_pdf(filename, flavor="stream", flag_size=True)
+    assert_frame_equal(df, tables[0].df)
+
+
+def test_stream_strip_text():
+    df = pd.DataFrame(data_stream_strip_text)
+
+    filename = os.path.join(testdir, "detect_vertical_false.pdf")
+    tables = camelot.read_pdf(filename, flavor="stream", strip_text=" ,\n")
+    assert_frame_equal(df, tables[0].df)
+
+
+def test_stream_edge_tol():
+    df = pd.DataFrame(data_stream_edge_tol)
+
+    filename = os.path.join(testdir, "edge_tol.pdf")
+    tables = camelot.read_pdf(filename, flavor="stream", edge_tol=500)
+    assert_frame_equal(df, tables[0].df)
+
+
+def test_stream_layout_kwargs():
+    df = pd.DataFrame(data_stream_layout_kwargs)
+
+    filename = os.path.join(testdir, "detect_vertical_false.pdf")
+    tables = camelot.read_pdf(
+        filename, flavor="stream", layout_kwargs={"detect_vertical": False}
+    )
+    assert_frame_equal(df, tables[0].df)
+
+
+def test_stream_duplicated_text():
+    df = pd.DataFrame(data_stream_duplicated_text)
+
+    filename = os.path.join(testdir, "birdisland.pdf")
+    tables = camelot.read_pdf(filename, flavor="stream")
+    assert_frame_equal(df, tables[0].df)