PEP fixes

InvenTree/part/models.py

@@ -371,7 +371,6 @@ class Part(MPTTModel):
             }
         }
 
-
     def get_context_data(self, request, **kwargs):
         """
         Return some useful context data about this part for template rendering

InvenTree/stock/api.py

@@ -351,7 +351,7 @@ class StockLocationList(generics.ListCreateAPIView):
                 loc = StockLocation.objects.get(pk=exclude_tree)
 
                 queryset = queryset.exclude(
-                    pk__in=[l.pk for l in loc.get_descendants(include_self=True)]
+                    pk__in=[subloc.pk for subloc in loc.get_descendants(include_self=True)]
                 )
 
             except (ValueError, StockLocation.DoesNotExist):