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usr/lib64/python3.6/genericpath.py 0000644 00000011224 14720450757 0012723 0 ustar 00 """ Path operations common to more than one OS Do not use directly. The OS specific modules import the appropriate functions from this module themselves. """ import os import stat __all__ = ['commonprefix', 'exists', 'getatime', 'getctime', 'getmtime', 'getsize', 'isdir', 'isfile', 'samefile', 'sameopenfile', 'samestat'] # Does a path exist? # This is false for dangling symbolic links on systems that support them. def exists(path): """Test whether a path exists. Returns False for broken symbolic links""" try: os.stat(path) except OSError: return False return True # This follows symbolic links, so both islink() and isdir() can be true # for the same path on systems that support symlinks def isfile(path): """Test whether a path is a regular file""" try: st = os.stat(path) except OSError: return False return stat.S_ISREG(st.st_mode) # Is a path a directory? # This follows symbolic links, so both islink() and isdir() # can be true for the same path on systems that support symlinks def isdir(s): """Return true if the pathname refers to an existing directory.""" try: st = os.stat(s) except OSError: return False return stat.S_ISDIR(st.st_mode) def getsize(filename): """Return the size of a file, reported by os.stat().""" return os.stat(filename).st_size def getmtime(filename): """Return the last modification time of a file, reported by os.stat().""" return os.stat(filename).st_mtime def getatime(filename): """Return the last access time of a file, reported by os.stat().""" return os.stat(filename).st_atime def getctime(filename): """Return the metadata change time of a file, reported by os.stat().""" return os.stat(filename).st_ctime # Return the longest prefix of all list elements. def commonprefix(m): "Given a list of pathnames, returns the longest common leading component" if not m: return '' # Some people pass in a list of pathname parts to operate in an OS-agnostic # fashion; don't try to translate in that case as that's an abuse of the # API and they are already doing what they need to be OS-agnostic and so # they most likely won't be using an os.PathLike object in the sublists. if not isinstance(m[0], (list, tuple)): m = tuple(map(os.fspath, m)) s1 = min(m) s2 = max(m) for i, c in enumerate(s1): if c != s2[i]: return s1[:i] return s1 # Are two stat buffers (obtained from stat, fstat or lstat) # describing the same file? def samestat(s1, s2): """Test whether two stat buffers reference the same file""" return (s1.st_ino == s2.st_ino and s1.st_dev == s2.st_dev) # Are two filenames really pointing to the same file? def samefile(f1, f2): """Test whether two pathnames reference the same actual file""" s1 = os.stat(f1) s2 = os.stat(f2) return samestat(s1, s2) # Are two open files really referencing the same file? # (Not necessarily the same file descriptor!) def sameopenfile(fp1, fp2): """Test whether two open file objects reference the same file""" s1 = os.fstat(fp1) s2 = os.fstat(fp2) return samestat(s1, s2) # Split a path in root and extension. # The extension is everything starting at the last dot in the last # pathname component; the root is everything before that. # It is always true that root + ext == p. # Generic implementation of splitext, to be parametrized with # the separators def _splitext(p, sep, altsep, extsep): """Split the extension from a pathname. Extension is everything from the last dot to the end, ignoring leading dots. Returns "(root, ext)"; ext may be empty.""" # NOTE: This code must work for text and bytes strings. sepIndex = p.rfind(sep) if altsep: altsepIndex = p.rfind(altsep) sepIndex = max(sepIndex, altsepIndex) dotIndex = p.rfind(extsep) if dotIndex > sepIndex: # skip all leading dots filenameIndex = sepIndex + 1 while filenameIndex < dotIndex: if p[filenameIndex:filenameIndex+1] != extsep: return p[:dotIndex], p[dotIndex:] filenameIndex += 1 return p, p[:0] def _check_arg_types(funcname, *args): hasstr = hasbytes = False for s in args: if isinstance(s, str): hasstr = True elif isinstance(s, bytes): hasbytes = True else: raise TypeError('%s() argument must be str or bytes, not %r' % (funcname, s.__class__.__name__)) from None if hasstr and hasbytes: raise TypeError("Can't mix strings and bytes in path components") from None
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