diff --git a/modeltranslation/admin.py b/modeltranslation/admin.py
index 4d79dfcb..d2ed19a0 100755
--- a/modeltranslation/admin.py
+++ b/modeltranslation/admin.py
@@ -6,6 +6,13 @@
 from django.contrib.admin.options import BaseModelAdmin, flatten_fieldsets, InlineModelAdmin
 from django import forms
 
+from modeltranslation import settings as mt_settings
+from modeltranslation.translator import translator
+from modeltranslation.utils import (
+    get_translation_fields, build_css_class, build_localized_fieldname, get_language,
+    get_language_bidi, unique)
+from modeltranslation.widgets import ClearableWidgetWrapper
+
 # Ensure that models are registered for translation before TranslationAdmin
 # runs. The import is supposed to resolve a race condition between model import
 # and translation registration in production (see issue #19).
@@ -16,12 +23,6 @@
 else:
     from django.contrib.contenttypes.admin import GenericTabularInline
     from django.contrib.contenttypes.admin import GenericStackedInline
-from modeltranslation import settings as mt_settings
-from modeltranslation.translator import translator
-from modeltranslation.utils import (
-    get_translation_fields, build_css_class, build_localized_fieldname, get_language,
-    get_language_bidi, unique)
-from modeltranslation.widgets import ClearableWidgetWrapper
 
 
 class TranslationBaseModelAdmin(BaseModelAdmin):
@@ -74,8 +75,12 @@ def patch_translation_field(self, db_field, field, **kwargs):
                         b for b in form_class.__bases__ if b != NullCharField)
                 field.__class__ = type(
                     'Nullable%s' % form_class.__name__, (NullableField, form_class), {})
-            if ((db_field.empty_value == 'both' or orig_field.name in self.both_empty_values_fields)
-                    and isinstance(field.widget, (forms.TextInput, forms.Textarea))):
+            if (
+                (
+                    db_field.empty_value == 'both' or
+                    orig_field.name in self.both_empty_values_fields
+                ) and isinstance(field.widget, (forms.TextInput, forms.Textarea))
+            ):
                 field.widget = ClearableWidgetWrapper(field.widget)
             css_classes = field.widget.attrs.get('class', '').split(' ')
             css_classes.append('mt')
@@ -271,15 +276,15 @@ def _group_fieldsets(self, fieldsets):
             untranslated_fields = [
                 f.name for f in self.opts.fields if (
                     # Exclude the primary key field
-                    f is not self.opts.auto_field
+                    f is not self.opts.auto_field and
                     # Exclude non-editable fields
-                    and f.editable
+                    f.editable and
                     # Exclude the translation fields
-                    and not hasattr(f, 'translated_field')
+                    not hasattr(f, 'translated_field') and
                     # Honour field arguments. We rely on the fact that the
                     # passed fieldsets argument is already fully filtered
                     # and takes options like exclude into account.
-                    and f.name in flattened_fieldsets
+                    f.name in flattened_fieldsets
                 )
             ]
             # TODO: Allow setting a label
diff --git a/modeltranslation/tests/tests.py b/modeltranslation/tests/tests.py
index 685ecae7..920f24ba 100644
--- a/modeltranslation/tests/tests.py
+++ b/modeltranslation/tests/tests.py
@@ -1013,7 +1013,9 @@ def test_indonesian(self):
         self.assertNotEqual(field.attname, build_localized_fieldname(field.name, 'id'))
 
     def assertQuerysetsEqual(self, qs1, qs2):
-        pk = lambda o: o.pk
+        def pk(o):
+            return o.pk
+
         return self.assertEqual(sorted(qs1, key=pk), sorted(qs2, key=pk))
 
 
@@ -2459,16 +2461,16 @@ def test_q(self):
         n.save()
 
         self.assertEqual('en', get_language())
-        self.assertEqual(0, models.ManagerTestModel.objects.filter(Q(title='de')
-                                                                   | Q(pk=42)).count())
-        self.assertEqual(1, models.ManagerTestModel.objects.filter(Q(title='en')
-                                                                   | Q(pk=42)).count())
+        self.assertEqual(0, models.ManagerTestModel.objects.filter(Q(title='de') |
+                                                                   Q(pk=42)).count())
+        self.assertEqual(1, models.ManagerTestModel.objects.filter(Q(title='en') |
+                                                                   Q(pk=42)).count())
 
         with override('de'):
-            self.assertEqual(1, models.ManagerTestModel.objects.filter(Q(title='de')
-                                                                       | Q(pk=42)).count())
-            self.assertEqual(0, models.ManagerTestModel.objects.filter(Q(title='en')
-                                                                       | Q(pk=42)).count())
+            self.assertEqual(1, models.ManagerTestModel.objects.filter(Q(title='de') |
+                                                                       Q(pk=42)).count())
+            self.assertEqual(0, models.ManagerTestModel.objects.filter(Q(title='en') |
+                                                                       Q(pk=42)).count())
 
     def test_f(self):
         """Test if F queries are rewritten."""
diff --git a/modeltranslation/translator.py b/modeltranslation/translator.py
index 99b2de66..36ef1eef 100644
--- a/modeltranslation/translator.py
+++ b/modeltranslation/translator.py
@@ -440,9 +440,12 @@ def register(self, model_or_iterable, opts_class=None, **options):
                 add_translation_fields(model, opts)
 
             # Delete all fields cache for related model (parent and children)
-            related = ((f for f in model._meta.get_fields() if (f.one_to_many or f.one_to_one)
-                        and f.auto_created) if NEW_RELATED_API
-                       else model._meta.get_all_related_objects())
+            related = ((
+                f for f in model._meta.get_fields()
+                if (f.one_to_many or f.one_to_one) and
+                f.auto_created
+            ) if NEW_RELATED_API else model._meta.get_all_related_objects())
+
             for related_obj in related:
                 delete_cache_fields(related_obj.model)