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v0.5.1
https://github.com/python/cpython
09 December 2020, 11:06:31 UTC
Revision 016564ab51f991e7d67a62f4aa079df376ae549f authored by Guido van Rossum on 07 January 1995, 11:54:44 UTC, committed by Guido van Rossum on 07 January 1995, 11:54:44 UTC 
attribute-less object is AttributeError, not TypeError
1 parent 5e56997
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Tip revision: 016564ab51f991e7d67a62f4aa079df376ae549f authored by Guido van Rossum on 07 January 1995, 11:54:44 UTC
attribute-less object is AttributeError, not TypeError
Tip revision: 016564a
dircache.py 
# Module 'dircache'
#
# Return a sorted list of the files in a directory, using a cache
# to avoid reading the directory more often than necessary.
# Also contains a subroutine to append slashes to directories.

import os

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] + '/'
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