Fixed W503 flake8 warnings.

1 files changed, 5 insertions, 9 deletions

diff --git a/django/db/models/sql/query.py b/django/db/models/sql/query.py
index 1223e9a109..4a5eb1701a 100644
--- a/django/db/models/sql/query.py
+++ b/django/db/models/sql/query.py
@@ -735,9 +735,7 @@ class Query(object):
             # Only the first alias (skipped above) should have None join_type
             assert self.alias_map[alias].join_type is not None
             parent_alias = self.alias_map[alias].parent_alias
-            parent_louter = (
-                parent_alias
-                and self.alias_map[parent_alias].join_type == LOUTER)
+            parent_louter = parent_alias and self.alias_map[parent_alias].join_type == LOUTER
             already_louter = self.alias_map[alias].join_type == LOUTER
             if ((self.alias_map[alias].nullable or parent_louter) and
                     not already_louter):
@@ -746,8 +744,8 @@ class Query(object):
                 # refer to this one.
                 aliases.extend(
                     join for join in self.alias_map.keys()
-                    if (self.alias_map[join].parent_alias == alias
-                        and join not in aliases))
+                    if self.alias_map[join].parent_alias == alias and join not in aliases
+                )
 
     def demote_joins(self, aliases):
         """
@@ -1641,8 +1639,7 @@ class Query(object):
                 # from the model on which the lookup failed.
                 raise
             else:
-                names = sorted(list(get_field_names_from_opts(opts)) + list(self.extra)
-                               + list(self.annotation_select))
+                names = sorted(list(get_field_names_from_opts(opts)) + list(self.extra) + list(self.annotation_select))
                 raise FieldError("Cannot resolve keyword %r into field. "
                                  "Choices are: %s" % (name, ", ".join(names)))
 
@@ -1963,8 +1960,7 @@ class Query(object):
         # used. The proper fix would be to defer all decisions where
         # is_nullable() is needed to the compiler stage, but that is not easy
         # to do currently.
-        if ((connections[DEFAULT_DB_ALIAS].features.interprets_empty_strings_as_nulls)
-                and field.empty_strings_allowed):
+        if connections[DEFAULT_DB_ALIAS].features.interprets_empty_strings_as_nulls and field.empty_strings_allowed:
             return True
         else:
             return field.null