https://github.com/python/cpython
- HEAD
- refs/heads/3.10
- refs/heads/3.11
- refs/heads/3.12
- refs/heads/3.13
- refs/heads/3.8
- refs/heads/3.9
- refs/heads/main
- refs/tags/v0.9.8
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- v3.9.9
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- v3.7.17
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- v3.11.9
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- v3.11.3
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- v3.10.9
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- v3.10.3
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- v3.10.15
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- v3.10.10
- v3.10.1
- v3.10.0rc2
- v3.10.0rc1
- v3.10.0b4
- v3.10.0b3
- v3.10.0b2
- v3.10.0b1
- v3.10.0a7
- v3.10.0a6
- v3.10.0a5
- v3.10.0a4
- v3.10.0a3
- v3.10.0a2
- v3.10.0a1
- v3.10.0
- v2.7.18rc1
- v2.7.18
- v2.7.17rc1
- v2.7.17
- v2.7.16rc1
- v2.7.16
- v2.7.15rc1
- v2.7.15
- v2.7.14rc1
- v2.7.14
- legacy-trunk
- 3.7
- 3.6
- 3.5
- 3.4
- 3.3
- 3.2
- 3.1
- 3.0
- 2.7
- 2.6
- 2.5
- 2.4
- 2.3
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- 2.1
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Tip revision: 16c8eccfcf85811d1d9368aacb94b47ae8195719 authored by cvs2svn on 31 December 1997, 05:53:15 UTC
This commit was manufactured by cvs2svn to create tag 'release15'.
This commit was manufactured by cvs2svn to create tag 'release15'.
Tip revision: 16c8ecc
statcache.py
# Module 'statcache'
#
# Maintain a cache of file stats.
# There are functions to reset the cache or to selectively remove items.
import os
from stat import *
# The cache.
# Keys are pathnames, values are `os.stat' outcomes.
#
cache = {}
# Stat a file, possibly out of the cache.
#
def stat(path):
if cache.has_key(path):
return cache[path]
cache[path] = ret = os.stat(path)
return ret
# Reset the cache completely.
#
def reset():
global cache
cache = {}
# Remove a given item from the cache, if it exists.
#
def forget(path):
if cache.has_key(path):
del cache[path]
# Remove all pathnames with a given prefix.
#
def forget_prefix(prefix):
n = len(prefix)
for path in cache.keys():
if path[:n] == prefix:
del cache[path]
# Forget about a directory and all entries in it, but not about
# entries in subdirectories.
#
def forget_dir(prefix):
if prefix[-1:] == '/' and prefix <> '/':
prefix = prefix[:-1]
forget(prefix)
if prefix[-1:] <> '/':
prefix = prefix + '/'
n = len(prefix)
for path in cache.keys():
if path[:n] == prefix:
rest = path[n:]
if rest[-1:] == '/': rest = rest[:-1]
if '/' not in rest:
del cache[path]
# Remove all pathnames except with a given prefix.
# Normally used with prefix = '/' after a chdir().
#
def forget_except_prefix(prefix):
n = len(prefix)
for path in cache.keys():
if path[:n] <> prefix:
del cache[path]
# Check for directory.
#
def isdir(path):
try:
st = stat(path)
except os.error:
return 0
return S_ISDIR(st[ST_MODE])