From 4eb36de74d0da9e904a9eb835756f04f58325018 Mon Sep 17 00:00:00 2001
From: Ben Darnell <ben@bendarnell.com>
Date: Sat, 14 May 2011 16:15:39 -0700
Subject: [PATCH] types.NoneType no longer exists in python 3

---
 tornado/stack_context.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tornado/stack_context.py b/tornado/stack_context.py
index fd3ac50e1..c5570b499 100644
--- a/tornado/stack_context.py
+++ b/tornado/stack_context.py
@@ -48,8 +48,6 @@ Example usage:
 
 from __future__ import with_statement
 
-from types import NoneType
-
 import contextlib
 import functools
 import itertools
@@ -57,6 +55,8 @@ import logging
 import sys
 import threading
 
+NoneType = type(None)
+
 class _State(threading.local):
     def __init__(self):
         self.contexts = ()
-- 
2.47.3