From e4d849748c6cd6884da33cf0cf0cdaf8e319cf19 Mon Sep 17 00:00:00 2001
From: Jonathan Ellis <jbellis@gmail.com>
Date: Fri, 3 Aug 2007 14:02:28 +0000
Subject: only one instance of while len(...)

---
 lib/sqlalchemy/topological.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'lib/sqlalchemy')

diff --git a/lib/sqlalchemy/topological.py b/lib/sqlalchemy/topological.py
index dcfe9ea71..87efc802b 100644
--- a/lib/sqlalchemy/topological.py
+++ b/lib/sqlalchemy/topological.py
@@ -198,8 +198,8 @@ class QueueDependencySorter(object):
                 queue.append(n)
         cycles = {}
         output = []
-        while len(nodes) > 0:
-            if len(queue) == 0:
+        while nodes:
+            if not queue:
                 # edges remain but no edgeless nodes to remove; this indicates
                 # a cycle
                 if allow_all_cycles:
-- 
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