From bd6fb1a93de3726fb0295263a0e747a5822251e4 Mon Sep 17 00:00:00 2001
From: Peter Farrell <pjf@maestropublishing.com>
Date: Thu, 17 Oct 2019 16:34:09 -0500
Subject: [PATCH 1/2] Removed f-strings as they are not supported on Python 3.5

---
 djaa_list_filter/admin.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/djaa_list_filter/admin.py b/djaa_list_filter/admin.py
index a90900e..6bd2a55 100644
--- a/djaa_list_filter/admin.py
+++ b/djaa_list_filter/admin.py
@@ -24,10 +24,10 @@ class AjaxAutocompleteSelectWidget(AutocompleteSelect):
 
     def render(self, name, value, attrs=None, renderer=None):
         rendered = super().render(name, value, attrs, renderer)
-        return (
-            f'<div class="ajax-autocomplete-select-widget-wrapper" data-qs-target-value="{self.qs_target_value}">'
-            f'{rendered}'
-            '</div>'
+        return ("""
+            <div class="ajax-autocomplete-select-widget-wrapper" data-qs-target-value="{qs_target_value}">
+                {rendered}
+            </div>""".format(qs_target_value=self.qs_target_value, rendered=rendered)
         )
 
 

From 795ddf92be38ed04b4ecb520cacc9e77c922a011 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?U=C4=9Fur=20=C3=96zy=C4=B1lmazel?=
 <ugur.ozyilmazel@demirorenteknoloji.com>
Date: Sat, 19 Oct 2019 20:16:10 +0300
Subject: [PATCH 2/2] Add WillRemoveInVersion10 warning

---
 .pylintrc                 |  1 +
 djaa_list_filter/admin.py | 31 +++++++++++++++++++++++++------
 2 files changed, 26 insertions(+), 6 deletions(-)
 create mode 120000 .pylintrc

diff --git a/.pylintrc b/.pylintrc
new file mode 120000
index 0000000..ae9e54b
--- /dev/null
+++ b/.pylintrc
@@ -0,0 +1 @@
+/Users/vigo/Repos/Dropbox/Files/configs/pylintrc
\ No newline at end of file
diff --git a/djaa_list_filter/admin.py b/djaa_list_filter/admin.py
index 6bd2a55..19f6da2 100644
--- a/djaa_list_filter/admin.py
+++ b/djaa_list_filter/admin.py
@@ -1,5 +1,8 @@
 # pylint: disable=R0903,R0913,R0201
 
+import sys
+import warnings
+
 from django import forms
 from django.contrib import admin
 from django.contrib.admin.widgets import AutocompleteSelect
@@ -9,7 +12,13 @@ from django.db.models.fields.related_descriptors import (
 )
 from django.utils.translation import ugettext_lazy as _
 
-# from django.core.exceptions import ImproperlyConfigured
+CURRENT_PYTHON = sys.version_info[:2]
+REQUIRED_PYTHON_FOR_FSTRING = (3, 6)
+USE_FSTRING = CURRENT_PYTHON > REQUIRED_PYTHON_FOR_FSTRING
+
+
+class WillRemoveInVersion10(FutureWarning):
+    pass
 
 
 class AjaxAutocompleteSelectWidget(AutocompleteSelect):
@@ -24,11 +33,21 @@ class AjaxAutocompleteSelectWidget(AutocompleteSelect):
 
     def render(self, name, value, attrs=None, renderer=None):
         rendered = super().render(name, value, attrs, renderer)
-        return ("""
-            <div class="ajax-autocomplete-select-widget-wrapper" data-qs-target-value="{qs_target_value}">
-                {rendered}
-            </div>""".format(qs_target_value=self.qs_target_value, rendered=rendered)
-        )
+
+        if USE_FSTRING:
+            html_string = (
+                f'<div class="ajax-autocomplete-select-widget-wrapper" data-qs-target-value="{self.qs_target_value}">'
+                f'{rendered}'
+                '</div>'
+            )
+        else:
+            warnings.warn('Will remove str.format, will use f-strings only', WillRemoveInVersion10)
+            html_string = (
+                '<div class="ajax-autocomplete-select-widget-wrapper" data-qs-target-value="{qs_target_value}">'
+                '{rendered}'
+                '</div>'
+            ).format(qs_target_value=self.qs_target_value, rendered=rendered)
+        return html_string
 
 
 class AjaxAutocompleteListFilter(admin.RelatedFieldListFilter):