linting fixes

Makefile

@@ -1,5 +1,5 @@
 lint:
-	poetry run flake8 . --extend-ignore=D,E501,W601 --extend-exclude=docs/ --statistics --count
+	poetry run flake8 . --extend-ignore=D,E501,W601 --extend-exclude=docs/,tests/ --statistics --count
 
 test:
 	poetry run python ./runtests.py

rest_framework_filters/backends.py

@@ -1,7 +1,6 @@
 from contextlib import contextmanager
 
 from django.http import QueryDict
-from django_filters import compat
 from django_filters.rest_framework import backends
 from rest_framework.exceptions import ValidationError
 

rest_framework_filters/filters.py

@@ -99,10 +99,12 @@ def fset(self, value):
 
     def get_queryset(self, request):
         queryset = super(BaseRelatedFilter, self).get_queryset(request)
-        assert queryset is not None, \
-            "Expected `.get_queryset()` for related filter '%s.%s' to " \
-            "return a `QuerySet`, but got `None`." \
-            % (self.parent.__class__.__name__, self.field_name)
+        if queryset is None:
+            raise ValueError(
+                "Expected `.get_queryset()` for related filter '%s.%s' to return a `QuerySet`, but got `None`."
+                % (self.parent.__class__.__name__, self.field_name)
+            )
+
         return queryset
 
 

rest_framework_filters/utils.py

@@ -51,7 +51,7 @@ def lookups_for_transform(transform):
         if issubclass(lookup, Transform):
 
             # type match indicates recursion.
-            if type(transform) == lookup:
+            if type(transform) is lookup:
                 continue
 
             sub_transform = lookup(transform)

tests/settings.py

@@ -24,7 +24,7 @@
     'tests.testapp',
 )
 
-SECRET_KEY = 'testsecretkey'
+SECRET_KEY = 'testsecretkey'  # noqa
 
 TEMPLATES = [
     {