diff --git a/moto/dynamodb2/responses.py b/moto/dynamodb2/responses.py
index 39b67240c..d3fa68b7b 100644
--- a/moto/dynamodb2/responses.py
+++ b/moto/dynamodb2/responses.py
@@ -316,16 +316,18 @@ class DynamoHandler(BaseResponse):
             else:
                 index = table.schema
 
-            reverse_attribute_lookup = dict((v, k) for k, v in 
-											six.iteritems(self.body['ExpressionAttributeNames']))
+            reverse_attribute_lookup = dict((v, k) for k, v in
+                                            six.iteritems(self.body['ExpressionAttributeNames']))
 
             if " AND " in key_condition_expression:
                 expressions = key_condition_expression.split(" AND ", 1)
 
                 index_hash_key = [key for key in index if key['KeyType'] == 'HASH'][0]
-                hash_key_var = reverse_attribute_lookup.get(index_hash_key['AttributeName'], index_hash_key['AttributeName'])
+                hash_key_var = reverse_attribute_lookup.get(index_hash_key['AttributeName'],
+                                                            index_hash_key['AttributeName'])
                 hash_key_regex = r'(^|[\s(]){0}\b'.format(hash_key_var)
-                i, hash_key_expression = next((i, e) for i, e in enumerate(expressions) if re.search(hash_key_regex, e))
+                i, hash_key_expression = next((i, e) for i, e in enumerate(expressions)
+                                              if re.search(hash_key_regex, e))
                 hash_key_expression = hash_key_expression.strip('()')
                 expressions.pop(i)