Lichen

lib/genericpath.py

296:3c7946627c2d
2016-12-01 Paul Boddie Added support for the ord built-in function.
     1 """     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.     5 """     6 from os import error, stat     7 from stat import *     8      9 __all__ = ['commonprefix', 'exists', 'getatime', 'getctime', 'getmtime',    10            'getsize', 'isdir', 'isfile']    11     12     13 # Does a path exist?    14 # This is false for dangling symbolic links on systems that support them.    15 def exists(path):    16     """Test whether a path exists.  Returns False for broken symbolic links"""    17     try:    18         stat(path)    19     except error:    20         return False    21     return True    22     23     24 # This follows symbolic links, so both islink() and isdir() can be true    25 # for the same path ono systems that support symlinks    26 def isfile(path):    27     """Test whether a path is a regular file"""    28     try:    29         st = stat(path)    30     except error:    31         return False    32     return stat.S_ISREG(st.st_mode)    33     34     35 # Is a path a directory?    36 # This follows symbolic links, so both islink() and isdir()    37 # can be true for the same path on systems that support symlinks    38 def isdir(s):    39     """Return true if the pathname refers to an existing directory."""    40     try:    41         st = stat(s)    42     except error:    43         return False    44     return stat.S_ISDIR(st.st_mode)    45     46     47 def getsize(filename):    48     """Return the size of a file, reported by os.stat()."""    49     return stat(filename).st_size    50     51     52 def getmtime(filename):    53     """Return the last modification time of a file, reported by os.stat()."""    54     return stat(filename).st_mtime    55     56     57 def getatime(filename):    58     """Return the last access time of a file, reported by os.stat()."""    59     return stat(filename).st_atime    60     61     62 def getctime(filename):    63     """Return the metadata change time of a file, reported by os.stat()."""    64     return stat(filename).st_ctime    65     66     67 # Return the longest prefix of all list elements.    68 def commonprefix(m):    69     "Given a list of pathnames, returns the longest common leading component"    70     if not m: return ''    71     s1 = min(m)    72     s2 = max(m)    73     for i, c in enumerate(s1):    74         if c != s2[i]:    75             return s1[:i]    76     return s1    77     78 # Split a path in root and extension.    79 # The extension is everything starting at the last dot in the last    80 # pathname component; the root is everything before that.    81 # It is always true that root + ext == p.    82     83 # Generic implementation of splitext, to be parametrized with    84 # the separators    85 def _splitext(p, sep, altsep, extsep):    86     """Split the extension from a pathname.    87     88     Extension is everything from the last dot to the end, ignoring    89     leading dots.  Returns "(root, ext)"; ext may be empty."""    90     91     sepIndex = p.rfind(sep)    92     if altsep:    93         altsepIndex = p.rfind(altsep)    94         sepIndex = max(sepIndex, altsepIndex)    95     96     dotIndex = p.rfind(extsep)    97     if dotIndex > sepIndex:    98         # skip all leading dots    99         filenameIndex = sepIndex + 1   100         while filenameIndex < dotIndex:   101             if p[filenameIndex] != extsep:   102                 return p[:dotIndex], p[dotIndex:]   103             filenameIndex += 1   104    105     return p, ''