mirror of
https://github.com/python/cpython.git
synced 2025-11-04 11:49:12 +00:00
e99d5ea25b
added test script and expected output file as well this closes patch 103297. __all__ attributes will be added to other modules without first submitting a patch, just adding the necessary line to the test script to verify more-or-less correct implementation.
39 lines
1,021 B
Python
39 lines
1,021 B
Python
"""Read and cache directory listings.
|
|
|
|
The listdir() routine returns a sorted list of the files in a directory,
|
|
using a cache to avoid reading the directory more often than necessary.
|
|
The annotate() routine appends slashes to directories."""
|
|
|
|
import os
|
|
|
|
__all__ = ["listdir","opendir","annotate"]
|
|
|
|
cache = {}
|
|
|
|
def listdir(path):
|
|
"""List directory contents, using cache."""
|
|
try:
|
|
cached_mtime, list = cache[path]
|
|
del cache[path]
|
|
except KeyError:
|
|
cached_mtime, list = -1, []
|
|
try:
|
|
mtime = os.stat(path)[8]
|
|
except os.error:
|
|
return []
|
|
if mtime != cached_mtime:
|
|
try:
|
|
list = os.listdir(path)
|
|
except os.error:
|
|
return []
|
|
list.sort()
|
|
cache[path] = mtime, list
|
|
return list
|
|
|
|
opendir = listdir # XXX backward compatibility
|
|
|
|
def annotate(head, list):
|
|
"""Add '/' suffixes to directories."""
|
|
for i in range(len(list)):
|
|
if os.path.isdir(os.path.join(head, list[i])):
|
|
list[i] = list[i] + '/'
|