A large number of stylistic cleanups across django/db/

1 files changed, 7 insertions, 2 deletions

diff --git a/django/db/models/sql/where.py b/django/db/models/sql/where.py
index 2a342d417a..024b995c99 100644
--- a/django/db/models/sql/where.py
+++ b/django/db/models/sql/where.py
@@ -16,10 +16,12 @@ from django.utils.six.moves import xrange
 from django.utils import timezone
 from django.utils import tree
 
+
 # Connection types
 AND = 'AND'
 OR = 'OR'
 
+
 class EmptyShortCircuit(Exception):
     """
     Internal exception used to indicate that a "matches nothing" node should be
@@ -27,6 +29,7 @@ class EmptyShortCircuit(Exception):
     """
     pass
 
+
 class WhereNode(tree.Node):
     """
     Used to represent the SQL where-clause.
@@ -175,7 +178,7 @@ class WhereNode(tree.Node):
         """
         lvalue, lookup_type, value_annotation, params_or_value = child
         field_internal_type = lvalue.field.get_internal_type() if lvalue.field else None
-        
+
         if isinstance(lvalue, Constraint):
             try:
                 lvalue, params = lvalue.process(lookup_type, params_or_value, connection)
@@ -304,14 +307,15 @@ class WhereNode(tree.Node):
                 clone.children.append(child)
         return clone
 
-class EmptyWhere(WhereNode):
 
+class EmptyWhere(WhereNode):
     def add(self, data, connector):
         return
 
     def as_sql(self, qn=None, connection=None):
         raise EmptyResultSet
 
+
 class EverythingNode(object):
     """
     A node that matches everything.
@@ -385,6 +389,7 @@ class Constraint(object):
             new.alias, new.col, new.field = change_map[self.alias], self.col, self.field
             return new
 
+
 class SubqueryConstraint(object):
     def __init__(self, alias, columns, targets, query_object):
         self.alias = alias