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annotate Lib/macpath.py @ 74006:88198b93ff2f

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Issue #13560: Add PyUnicode_EncodeLocale() * Use PyUnicode_EncodeLocale() in time.strftime() if wcsftime() is not available * Document my last changes in Misc/NEWS
author Victor Stinner <victor.stinner@haypocalc.com>
date Sat, 17 Dec 2011 04:13:41 +0100
parents 3c9232a684ae
children 47f98a550d42
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1 """Pathname and path-related operations for the Macintosh."""
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2
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3 import os
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4 from stat import *
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5 import genericpath
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6 from genericpath import *
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7
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8 __all__ = ["normcase","isabs","join","splitdrive","split","splitext",
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9 "basename","dirname","commonprefix","getsize","getmtime",
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10 "getatime","getctime", "islink","exists","lexists","isdir","isfile",
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11 "expanduser","expandvars","normpath","abspath",
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12 "curdir","pardir","sep","pathsep","defpath","altsep","extsep",
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13 "devnull","realpath","supports_unicode_filenames"]
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14
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15 # strings representing various path-related bits and pieces
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16 # These are primarily for export; internally, they are hardcoded.
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17 curdir = ':'
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18 pardir = '::'
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19 extsep = '.'
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20 sep = ':'
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21 pathsep = '\n'
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22 defpath = ':'
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23 altsep = None
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24 devnull = 'Dev:Null'
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25
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26 def _get_colon(path):
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27 if isinstance(path, bytes):
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28 return b':'
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29 else:
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30 return ':'
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31
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32 # Normalize the case of a pathname. Dummy in Posix, but <s>.lower() here.
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33
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34 def normcase(path):
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35 if not isinstance(path, (bytes, str)):
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36 raise TypeError("normcase() argument must be str or bytes, "
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37 "not '{}'".format(path.__class__.__name__))
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38 return path.lower()
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39
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41 def isabs(s):
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42 """Return true if a path is absolute.
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43 On the Mac, relative paths begin with a colon,
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44 but as a special case, paths with no colons at all are also relative.
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45 Anything else is absolute (the string up to the first colon is the
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46 volume name)."""
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47
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48 colon = _get_colon(s)
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49 return colon in s and s[:1] != colon
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51
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52 def join(s, *p):
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53 colon = _get_colon(s)
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54 path = s
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55 for t in p:
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56 if (not s) or isabs(t):
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57 path = t
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58 continue
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59 if t[:1] == colon:
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60 t = t[1:]
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61 if colon not in path:
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62 path = colon + path
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63 if path[-1:] != colon:
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64 path = path + colon
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65 path = path + t
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66 return path
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68
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69 def split(s):
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70 """Split a pathname into two parts: the directory leading up to the final
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71 bit, and the basename (the filename, without colons, in that directory).
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72 The result (s, t) is such that join(s, t) yields the original argument."""
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73
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74 colon = _get_colon(s)
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75 if colon not in s: return s[:0], s
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76 col = 0
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77 for i in range(len(s)):
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78 if s[i:i+1] == colon: col = i + 1
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79 path, file = s[:col-1], s[col:]
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80 if path and not colon in path:
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81 path = path + colon
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82 return path, file
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84
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85 def splitext(p):
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86 if isinstance(p, bytes):
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87 return genericpath._splitext(p, b':', altsep, b'.')
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88 else:
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89 return genericpath._splitext(p, sep, altsep, extsep)
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90 splitext.__doc__ = genericpath._splitext.__doc__
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91
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92 def splitdrive(p):
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93 """Split a pathname into a drive specification and the rest of the
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94 path. Useful on DOS/Windows/NT; on the Mac, the drive is always
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95 empty (don't use the volume name -- it doesn't have the same
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96 syntactic and semantic oddities as DOS drive letters, such as there
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97 being a separate current directory per drive)."""
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98
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99 return p[:0], p
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101
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102 # Short interfaces to split()
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103
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104 def dirname(s): return split(s)[0]
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105 def basename(s): return split(s)[1]
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106
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107 def ismount(s):
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108 if not isabs(s):
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109 return False
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110 components = split(s)
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111 return len(components) == 2 and not components[1]
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112
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113 def islink(s):
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114 """Return true if the pathname refers to a symbolic link."""
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115
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116 try:
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117 import Carbon.File
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118 return Carbon.File.ResolveAliasFile(s, 0)[2]
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119 except:
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120 return False
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121
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122 # Is `stat`/`lstat` a meaningful difference on the Mac? This is safe in any
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123 # case.
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124
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125 def lexists(path):
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126 """Test whether a path exists. Returns True for broken symbolic links"""
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127
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128 try:
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129 st = os.lstat(path)
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130 except os.error:
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131 return False
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Johannes Gijsbers <jlg@dds.nl>
parents: 32302
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132 return True
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Johannes Gijsbers <jlg@dds.nl>
parents: 32302
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133
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134 def expandvars(path):
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Guido van Rossum <guido@python.org>
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135 """Dummy to retain interface-compatibility with other operating systems."""
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Guido van Rossum <guido@python.org>
parents: 11137
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136 return path
1086
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Guido van Rossum <guido@python.org>
parents: 770
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137
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Guido van Rossum <guido@python.org>
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138
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Guido van Rossum <guido@python.org>
parents: 11137
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139 def expanduser(path):
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Guido van Rossum <guido@python.org>
parents: 11137
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140 """Dummy to retain interface-compatibility with other operating systems."""
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Guido van Rossum <guido@python.org>
parents: 11137
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141 return path
2947
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Guido van Rossum <guido@python.org>
parents: 2910
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142
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Neal Norwitz <nnorwitz@gmail.com>
parents: 22702
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143 class norm_error(Exception):
18dccdf2c46d Use docstrings for exception classes
Neal Norwitz <nnorwitz@gmail.com>
parents: 22702
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144 """Path cannot be normalized"""
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Guido van Rossum <guido@python.org>
parents: 770
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145
db817f3a1c65 * change default line numbers for 'list' in pdb.py
Guido van Rossum <guido@python.org>
parents: 770
diff changeset
146 def normpath(s):
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Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
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147 """Normalize a pathname. Will return the same result for
1c00fea9ae40 Rewrite of normpath() by Corran Webster, so trailing :s are removed
Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
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148 equivalent paths."""
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Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
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149
49414
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Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 46770
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150 colon = _get_colon(s)
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Guido van Rossum <guido@python.org>
parents: 11137
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151
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Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 46770
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152 if colon not in s:
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parents: 46770
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153 return colon + s
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Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 46770
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154
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Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 46770
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155 comps = s.split(colon)
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Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
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156 i = 1
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Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
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157 while i < len(comps)-1:
49414
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Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 46770
diff changeset
158 if not comps[i] and comps[i-1]:
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Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
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159 if i > 1:
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Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
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160 del comps[i-1:i+1]
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Fred Drake <fdrake@acm.org>
parents: 14128
diff changeset
161 i = i - 1
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Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
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162 else:
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Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
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163 # best way to handle this is to raise an exception
43020
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Collin Winter <collinw@gmail.com>
parents: 41554
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164 raise norm_error('Cannot use :: immediately after volume name')
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Guido van Rossum <guido@python.org>
parents: 11137
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165 else:
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Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
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166 i = i + 1
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Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
diff changeset
167
49414
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Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 46770
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168 s = colon.join(comps)
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Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
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169
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Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
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170 # remove trailing ":" except for ":" and "Volume:"
49414
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Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 46770
diff changeset
171 if s[-1:] == colon and len(comps) > 2 and s != colon*len(s):
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Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
diff changeset
172 s = s[:-1]
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Guido van Rossum <guido@python.org>
parents: 11137
diff changeset
173 return s
2910
5a2612fb6c0e Added missing walk() function
Jack Jansen <jack.jansen@cwi.nl>
parents: 2260
diff changeset
174
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Guido van Rossum <guido@python.org>
parents: 8746
diff changeset
175 def abspath(path):
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Guido van Rossum <guido@python.org>
parents: 11137
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176 """Return an absolute path."""
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Guido van Rossum <guido@python.org>
parents: 8746
diff changeset
177 if not isabs(path):
60063
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Florent Xicluna <florent.xicluna@gmail.com>
parents: 49414
diff changeset
178 if isinstance(path, bytes):
e63d4678fca7 Note: only the relevant parts of r79474 are merged.
Florent Xicluna <florent.xicluna@gmail.com>
parents: 49414
diff changeset
179 cwd = os.getcwdb()
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Florent Xicluna <florent.xicluna@gmail.com>
parents: 49414
diff changeset
180 else:
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Florent Xicluna <florent.xicluna@gmail.com>
parents: 49414
diff changeset
181 cwd = os.getcwd()
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Florent Xicluna <florent.xicluna@gmail.com>
parents: 49414
diff changeset
182 path = join(cwd, path)
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Guido van Rossum <guido@python.org>
parents: 8746
diff changeset
183 return normpath(path)
19934
f2f25a738f7f SF patch #461781 by Chris Lawrence: os.path.realpath - Resolve symlinks:
Guido van Rossum <guido@python.org>
parents: 19080
diff changeset
184
f2f25a738f7f SF patch #461781 by Chris Lawrence: os.path.realpath - Resolve symlinks:
Guido van Rossum <guido@python.org>
parents: 19080
diff changeset
185 # realpath is a no-op on systems without islink support
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Jack Jansen <jack.jansen@cwi.nl>
parents: 22867
diff changeset
186 def realpath(path):
23521
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Tim Peters <tim.peters@gmail.com>
parents: 23237
diff changeset
187 path = abspath(path)
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Tim Peters <tim.peters@gmail.com>
parents: 23237
diff changeset
188 try:
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Jack Jansen <jack.jansen@cwi.nl>
parents: 27897
diff changeset
189 import Carbon.File
23521
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Tim Peters <tim.peters@gmail.com>
parents: 23237
diff changeset
190 except ImportError:
a90faa5f9417 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 23237
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191 return path
a90faa5f9417 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 23237
diff changeset
192 if not path:
a90faa5f9417 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 23237
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193 return path
49414
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Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 46770
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194 colon = _get_colon(path)
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Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 46770
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195 components = path.split(colon)
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Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 46770
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196 path = components[0] + colon
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Tim Peters <tim.peters@gmail.com>
parents: 23237
diff changeset
197 for c in components[1:]:
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Tim Peters <tim.peters@gmail.com>
parents: 23237
diff changeset
198 path = join(path, c)
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Florent Xicluna <florent.xicluna@gmail.com>
parents: 49414
diff changeset
199 try:
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Florent Xicluna <florent.xicluna@gmail.com>
parents: 49414
diff changeset
200 path = Carbon.File.FSResolveAliasFile(path, 1)[0].as_pathname()
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Florent Xicluna <florent.xicluna@gmail.com>
parents: 49414
diff changeset
201 except Carbon.File.Error:
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Florent Xicluna <florent.xicluna@gmail.com>
parents: 49414
diff changeset
202 pass
23521
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Tim Peters <tim.peters@gmail.com>
parents: 23237
diff changeset
203 return path
25666
4a825b902310 Add os.path.supports_unicode_filenames for all platforms,
Mark Hammond <mhammond@skippinet.com.au>
parents: 23625
diff changeset
204
64718
557355e46ba6 Issue #767645: Set os.path.supports_unicode_filenames to True on Mac OS X
Victor Stinner <victor.stinner@haypocalc.com>
parents: 62490
diff changeset
205 supports_unicode_filenames = True