Fix isort inconsistency

src/drf_yasg/codecs.py

@@ -1,9 +1,10 @@
+from future.utils import raise_from
+
 import copy
 import json
 from collections import OrderedDict
 
 from coreapi.compat import force_bytes
-from future.utils import raise_from
 from ruamel import yaml
 
 from . import openapi

src/drf_yasg/views.py

@@ -10,8 +10,7 @@ from rest_framework.response import Response
 from rest_framework.settings import api_settings
 from rest_framework.views import APIView
 
-from drf_yasg.app_settings import swagger_settings
-
+from .app_settings import swagger_settings
 from .generators import OpenAPISchemaGenerator
 from .renderers import OpenAPIRenderer, ReDocRenderer, SwaggerJSONRenderer, SwaggerUIRenderer, SwaggerYAMLRenderer