2
Path operations common to more than one OS
3
Do not use directly. The OS specific modules import the appropriate
4
functions from this module themselves.
9
__all__ = ['commonprefix', 'exists', 'getatime', 'getctime', 'getmtime',
10
'getsize', 'isdir', 'isfile']
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# This is false for dangling symbolic links on systems that support them.
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"""Test whether a path exists. Returns False for broken symbolic links"""
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# This follows symbolic links, so both islink() and isdir() can be true
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# for the same path ono systems that support symlinks
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"""Test whether a path is a regular file"""
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return stat.S_ISREG(st.st_mode)
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# Is a path a directory?
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# This follows symbolic links, so both islink() and isdir()
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# can be true for the same path on systems that support symlinks
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"""Return true if the pathname refers to an existing directory."""
44
return stat.S_ISDIR(st.st_mode)
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def getsize(filename):
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"""Return the size of a file, reported by os.stat()."""
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return os.stat(filename).st_size
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def getmtime(filename):
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"""Return the last modification time of a file, reported by os.stat()."""
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return os.stat(filename).st_mtime
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def getatime(filename):
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"""Return the last access time of a file, reported by os.stat()."""
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return os.stat(filename).st_atime
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def getctime(filename):
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"""Return the metadata change time of a file, reported by os.stat()."""
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return os.stat(filename).st_ctime
67
# Return the longest prefix of all list elements.
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"Given a list of pathnames, returns the longest common leading component"
73
for i, c in enumerate(s1):
78
# Split a path in root and extension.
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# The extension is everything starting at the last dot in the last
80
# pathname component; the root is everything before that.
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# It is always true that root + ext == p.
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# Generic implementation of splitext, to be parametrized with
85
def _splitext(p, sep, altsep, extsep):
86
"""Split the extension from a pathname.
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Extension is everything from the last dot to the end, ignoring
89
leading dots. Returns "(root, ext)"; ext may be empty."""
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# NOTE: This code must work for text and bytes strings.
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sepIndex = p.rfind(sep)
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altsepIndex = p.rfind(altsep)
95
sepIndex = max(sepIndex, altsepIndex)
97
dotIndex = p.rfind(extsep)
98
if dotIndex > sepIndex:
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# skip all leading dots
100
filenameIndex = sepIndex + 1
101
while filenameIndex < dotIndex:
102
if p[filenameIndex:filenameIndex+1] != extsep:
103
return p[:dotIndex], p[dotIndex:]