From f2b00f1048e74975a1e14c35580d8f092e812784 Mon Sep 17 00:00:00 2001
From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Tue, 12 Jan 2016 10:49:14 -0500
Subject: [PATCH] - convert keys to str for None not sortable against str on
 py3k

---
 lib/sqlalchemy/sql/schema.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/sqlalchemy/sql/schema.py b/lib/sqlalchemy/sql/schema.py
index 628d06183f..0626cb2b45 100644
--- a/lib/sqlalchemy/sql/schema.py
+++ b/lib/sqlalchemy/sql/schema.py
@@ -3890,7 +3890,7 @@ class _SchemaTranslateMap(object):
             self.__call__ = schema_for_object
             self.hash_key = ";".join(
                 "%s=%s" % (k, map_[k])
-                for k in sorted(map_)
+                for k in sorted(map_, key=str)
             )
             self.is_default = False
         else:
-- 
2.47.2