From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Wed, 29 Sep 2010 06:15:07 +0000 (-0400)
Subject: don't need itertools here
X-Git-Tag: rel_0_6_5~36
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a9875e395025c28c728ed4afb50036a81a07b0a2;p=thirdparty%2Fsqlalchemy%2Fsqlalchemy.git

don't need itertools here
---

diff --git a/lib/sqlalchemy/topological.py b/lib/sqlalchemy/topological.py
index 9386f73354..0f4f324618 100644
--- a/lib/sqlalchemy/topological.py
+++ b/lib/sqlalchemy/topological.py
@@ -8,7 +8,7 @@
 
 from sqlalchemy.exc import CircularDependencyError
 from sqlalchemy import util
-import itertools
+
 
 __all__ = ['sort', 'sort_as_subsets', 'find_cycles']
 
@@ -76,10 +76,8 @@ def find_cycles(tuples, allitems):
     return output
 
 def _gen_edges(edges):
-    return set(itertools.chain(
-                *[
-                    [
-                        (right, left) for right in edges[left]
-                    ] for left in edges
-                ]
-            ))
+    return set([
+                    (right, left) 
+                    for left in edges 
+                    for right in edges[left] 
+                ])