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excellent place to use a set() #5069

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Benjamin Peterson 2009-01-27 03:07:53 +00:00
parent d081abc8be
commit 1763f8adb4
1 changed files with 2 additions and 2 deletions
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4
Lib/posixpath.py
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@ -369,12 +369,12 @@ def _resolve_link(path):
until we either arrive at something that isn't a symlink, or 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). encounter a path we've seen before (meaning that there's a loop).
""" """
paths_seen = [] paths_seen = set()
while islink(path): while islink(path):
if path in paths_seen: if path in paths_seen:
# Already seen this path, so we must have a symlink loop # Already seen this path, so we must have a symlink loop
return None return None
paths_seen.append(path) paths_seen.add(path)
# Resolve where the link points to # Resolve where the link points to
resolved = os.readlink(path) resolved = os.readlink(path)
if not isabs(resolved): if not isabs(resolved):