{} is better than dict()

http://doughellmann.com/2012/11/12/the-performance-impact-of-using-dict-instead-of-in-cpython-2-7-2.html

django/website/data_layer/tests/handler_tests.py

@@ -13,7 +13,7 @@ class HandlerTests(TestCase):
         now = timezone.now().replace(
             microsecond=0  # MySQL discards microseconds
         )
-        inmessage = dict(body="Text", timestamp=now)
+        inmessage = {'body': "Text", 'timestamp': now}
 
         handlers.Message.create(inmessage)