[Python-checkins] r52316 - python/trunk/Lib/posixpath.py
georg.brandl
python-checkins at python.org
Thu Oct 12 15:08:17 CEST 2006
Author: georg.brandl
Date: Thu Oct 12 15:08:16 2006
New Revision: 52316
Modified:
python/trunk/Lib/posixpath.py
Log:
Bug #1560179: speed up posixpath.(dir|base)name
Modified: python/trunk/Lib/posixpath.py
==============================================================================
--- python/trunk/Lib/posixpath.py (original)
+++ python/trunk/Lib/posixpath.py Thu Oct 12 15:08:16 2006
@@ -106,18 +106,23 @@
return '', p
-# Return the tail (basename) part of a path.
+# Return the tail (basename) part of a path, same as split(path)[1].
def basename(p):
"""Returns the final component of a pathname"""
- return split(p)[1]
+ i = p.rfind('/') + 1
+ return p[i:]
-# Return the head (dirname) part of a path.
+# Return the head (dirname) part of a path, same as split(path)[0].
def dirname(p):
"""Returns the directory component of a pathname"""
- return split(p)[0]
+ i = p.rfind('/') + 1
+ head = p[:i]
+ if head and head != '/'*len(head):
+ head = head.rstrip('/')
+ return head
# Is a path a symbolic link?
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