Mercurial > repos > bcclaywell > argo_navis

annotate venv/lib/python2.7/genericpath.py @ 0:d67268158946 draft

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planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
author bcclaywell
date Mon, 12 Oct 2015 17:43:33 -0400
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1 """
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2 Path operations common to more than one OS
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3 Do not use directly. The OS specific modules import the appropriate
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4 functions from this module themselves.
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5 """
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6 import os
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7 import stat
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8
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9 __all__ = ['commonprefix', 'exists', 'getatime', 'getctime', 'getmtime',
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10 'getsize', 'isdir', 'isfile']
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11
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12
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13 try:
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14 _unicode = unicode
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15 except NameError:
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16 # If Python is built without Unicode support, the unicode type
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17 # will not exist. Fake one.
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18 class _unicode(object):
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19 pass
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20
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21 # Does a path exist?
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22 # This is false for dangling symbolic links on systems that support them.
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23 def exists(path):
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24 """Test whether a path exists. Returns False for broken symbolic links"""
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25 try:
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26 os.stat(path)
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27 except os.error:
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28 return False
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29 return True
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30
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31
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32 # This follows symbolic links, so both islink() and isdir() can be true
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33 # for the same path on systems that support symlinks
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34 def isfile(path):
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35 """Test whether a path is a regular file"""
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36 try:
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37 st = os.stat(path)
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38 except os.error:
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39 return False
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40 return stat.S_ISREG(st.st_mode)
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41
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42
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43 # Is a path a directory?
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44 # This follows symbolic links, so both islink() and isdir()
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45 # can be true for the same path on systems that support symlinks
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46 def isdir(s):
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47 """Return true if the pathname refers to an existing directory."""
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48 try:
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49 st = os.stat(s)
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50 except os.error:
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51 return False
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52 return stat.S_ISDIR(st.st_mode)
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53
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54
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55 def getsize(filename):
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56 """Return the size of a file, reported by os.stat()."""
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57 return os.stat(filename).st_size
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58
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59
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60 def getmtime(filename):
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61 """Return the last modification time of a file, reported by os.stat()."""
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62 return os.stat(filename).st_mtime
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63
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64
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65 def getatime(filename):
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66 """Return the last access time of a file, reported by os.stat()."""
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67 return os.stat(filename).st_atime
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68
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69
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70 def getctime(filename):
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71 """Return the metadata change time of a file, reported by os.stat()."""
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72 return os.stat(filename).st_ctime
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73
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74
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75 # Return the longest prefix of all list elements.
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76 def commonprefix(m):
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77 "Given a list of pathnames, returns the longest common leading component"
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78 if not m: return ''
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79 s1 = min(m)
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80 s2 = max(m)
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81 for i, c in enumerate(s1):
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82 if c != s2[i]:
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83 return s1[:i]
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84 return s1
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85
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86 # Split a path in root and extension.
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87 # The extension is everything starting at the last dot in the last
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88 # pathname component; the root is everything before that.
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89 # It is always true that root + ext == p.
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90
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91 # Generic implementation of splitext, to be parametrized with
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92 # the separators
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93 def _splitext(p, sep, altsep, extsep):
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94 """Split the extension from a pathname.
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95
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96 Extension is everything from the last dot to the end, ignoring
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97 leading dots. Returns "(root, ext)"; ext may be empty."""
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98
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99 sepIndex = p.rfind(sep)
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100 if altsep:
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101 altsepIndex = p.rfind(altsep)
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102 sepIndex = max(sepIndex, altsepIndex)
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103
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104 dotIndex = p.rfind(extsep)
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105 if dotIndex > sepIndex:
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106 # skip all leading dots
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107 filenameIndex = sepIndex + 1
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108 while filenameIndex < dotIndex:
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109 if p[filenameIndex] != extsep:
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110 return p[:dotIndex], p[dotIndex:]
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111 filenameIndex += 1
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112
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113 return p, ''