'Solution'

cinema/serializers.py

@@ -15,7 +15,8 @@ def create(self, validated_data):
     def update(self, instance, validated_data):
         instance.title = validated_data.get("title", instance.title)
         instance.description = validated_data.get(
-            "description", instance.description
+            "description",
+            instance.description
         )
         instance.duration = validated_data.get("duration", instance.duration)
 
@@ -35,10 +36,10 @@ def create(self, validated_data):
 
     def update(self, instance, validated_data):
         instance.name = validated_data.get("name", instance.name)
-        instance.rows = validated_data.get(
-            "rows", instance.rows
+        instance.rows = validated_data.get("rows", instance.rows)
+        instance.seats_in_row = validated_data.get(
+            "seats_in_row", instance.seats_in_row
         )
-        instance.seats_in_row = validated_data.get("seats_in_row", instance.seats_in_row)
 
         instance.save()
 
@@ -67,8 +68,14 @@ def create(self, validated_data):
         return Actor.objects.create(**validated_data)
 
     def update(self, instance, validated_data):
-        instance.first_name = validated_data.get("first_name", instance.first_name)
-        instance.last_name = validated_data.get("last_name", instance.last_name)
+        instance.first_name = validated_data.get(
+            "first_name",
+            instance.first_name
+        )
+        instance.last_name = validated_data.get(
+            "last_name",
+            instance.last_name
+        )
 
         instance.save()
 

cinema/urls.py

@@ -7,7 +7,7 @@
     ActorList,
     ActorDetail,
     GenreList,
-    GenreDetail
+    GenreDetail,
 )
 
 router = routers.DefaultRouter()
@@ -20,6 +20,5 @@
     path("genres/<int:pk>/", GenreDetail.as_view(), name="genre-detail"),
     path("actors/", ActorList.as_view(), name="actor-list"),
     path("actors/<int:pk>/", ActorDetail.as_view(), name="actor-detail"),
-    ]
-
+]
 app_name = "cinema"

cinema/views.py

@@ -50,9 +50,7 @@ def delete(self, request, pk):
 
 
 class ActorList(
-    mixins.ListModelMixin,
-    mixins.CreateModelMixin,
-    generics.GenericAPIView
+    mixins.ListModelMixin, mixins.CreateModelMixin, generics.GenericAPIView
 ):
     queryset = Actor.objects.all()
     serializer_class = ActorSerializer
@@ -68,7 +66,7 @@ class ActorDetail(
     mixins.RetrieveModelMixin,
     mixins.UpdateModelMixin,
     mixins.DestroyModelMixin,
-    generics.GenericAPIView
+    generics.GenericAPIView,
 ):
 
     queryset = Actor.objects.all()
@@ -90,7 +88,7 @@ class CinemaHallViewSet(
     mixins.RetrieveModelMixin,
     mixins.UpdateModelMixin,
     mixins.DestroyModelMixin,
-    viewsets.GenericViewSet
+    viewsets.GenericViewSet,
 ):
 
     queryset = CinemaHall.objects.all()