Reformat code style

apps/collection/models.py

@@ -6,9 +6,10 @@ from django.core.validators import MaxValueValidator, MinValueValidator
 from django.db import models
 from django.utils.translation import gettext_lazy as _
 
-from utils.models import ProjectBaseMixin, URLImageMixin
-from utils.models import TJSONField
-from utils.models import TranslatedFieldsMixin
+from utils.models import (
+    ProjectBaseMixin, TJSONField, TranslatedFieldsMixin,
+    URLImageMixin,
+)
 from utils.querysets import RelatedObjectsCountMixin
 
 

apps/collection/serializers/back.py

@@ -7,7 +7,8 @@ from location.models import Country
 from location.serializers import CountrySimpleSerializer
 from product.models import Product
 from utils.exceptions import (
-    BindingObjectNotFound, RemovedBindingObjectNotFound, ObjectAlreadyAdded
+    BindingObjectNotFound, ObjectAlreadyAdded,
+    RemovedBindingObjectNotFound,
 )
 
 

apps/collection/views/back.py

@@ -1,7 +1,5 @@
 from django_filters.rest_framework import DjangoFilterBackend
-from rest_framework import mixins
-from rest_framework import permissions
-from rest_framework import viewsets
+from rest_framework import mixins, permissions, viewsets
 from rest_framework.filters import OrderingFilter
 
 from collection import models