From 1763f8adb4d2d7b59fefedff0aa8ed652c4fe8d2 Mon Sep 17 00:00:00 2001
From: Benjamin Peterson <benjamin@python.org>
Date: Tue, 27 Jan 2009 03:07:53 +0000
Subject: excellent place to use a set() #5069

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

diff --git a/Lib/posixpath.py b/Lib/posixpath.py
index 9fa53d0..6eb45fd 100644
--- a/Lib/posixpath.py
+++ b/Lib/posixpath.py
@@ -369,12 +369,12 @@ def _resolve_link(path):
     until we either arrive at something that isn't a symlink, or
     encounter a path we've seen before (meaning that there's a loop).
     """
-    paths_seen = []
+    paths_seen = set()
     while islink(path):
         if path in paths_seen:
             # Already seen this path, so we must have a symlink loop
             return None
-        paths_seen.append(path)
+        paths_seen.add(path)
         # Resolve where the link points to
         resolved = os.readlink(path)
         if not isabs(resolved):
-- 
cgit v0.12