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v0.5.1
https://github.com/python/cpython
09 December 2020, 11:06:31 UTC
Revision a2fe103c9b75b20f2cd1362b7ecbd7edff1fc66c authored by Ka-Ping Yee on 02 March 2001, 01:19:14 UTC, committed by Ka-Ping Yee on 02 March 2001, 01:19:14 UTC 
Use imp.get_suffixes to determine a module name in modulename(file).
 
When possible, display strings containing backslashes using r'' notation.
1 parent 7fc49a4
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Tip revision: a2fe103c9b75b20f2cd1362b7ecbd7edff1fc66c authored by Ka-Ping Yee on 02 March 2001, 01:19:14 UTC
Use imp.get_suffixes to determine a module name in modulename(file).
Tip revision: a2fe103
dircache.py 
"""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] + '/'
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