code quality

aircox/admin/mixins.py

@@ -1,23 +1,22 @@
 class UnrelatedInlineMixin:
-    """
-    Inline class that can be included in an admin change view whose model
-    is not directly related to inline's model.
-    """
+    """Inline class that can be included in an admin change view whose model is
+    not directly related to inline's model."""
+
     view_model = None
     parent_model = None
-    parent_fk = ''
+    parent_fk = ""
 
     def __init__(self, parent_model, admin_site):
         self.view_model = parent_model
         super().__init__(self.parent_model, admin_site)
 
     def get_parent(self, view_obj):
-        """ Get formset's instance from `obj` of AdminSite's change form. """
+        """Get formset's instance from `obj` of AdminSite's change form."""
         field = self.parent_model._meta.get_field(self.parent_fk).remote_field
         return getattr(view_obj, field.name, None)
 
     def save_parent(self, parent, view_obj):
-        """ Save formset's instance. """
+        """Save formset's instance."""
         setattr(parent, self.parent_fk, view_obj)
         parent.save()
         return parent
@@ -25,6 +24,7 @@ class UnrelatedInlineMixin:
     def get_formset(self, request, obj):
         ParentFormSet = super().get_formset(request, obj)
         inline = self
+
         class FormSet(ParentFormSet):
             view_obj = None
 
@@ -37,6 +37,5 @@ class UnrelatedInlineMixin:
             def save(self):
                 inline.save_parent(self.instance, self.view_obj)
                 return super().save()
+
         return FormSet
-
-