Mercurial > cpython-lru_cache-weakref

annotate Lib/macpath.py @ 27022:e2c88c451c19 legacy-trunk

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Replaced imp.set_frozenmodules() cruft with proper zipimport support. This work uncovered the zipimport bug in 2.3a1 -- wish I'd had time to do this before the release :-(.
author Just van Rossum <just@letterror.com>
date Thu, 02 Jan 2003 13:13:01 +0000
parents acdb39b714b1
children 94b9cf4274de
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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
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6 __all__ = ["normcase","isabs","join","splitdrive","split","splitext",
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7 "basename","dirname","commonprefix","getsize","getmtime",
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8 "getatime","getctime", "islink","exists","isdir","isfile",
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9 "walk","expanduser","expandvars","normpath","abspath",
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10 "supports_unicode_filenames"]
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11
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12 # Normalize the case of a pathname. Dummy in Posix, but <s>.lower() here.
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13
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14 def normcase(path):
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15 return path.lower()
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16
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18 def isabs(s):
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19 """Return true if a path is absolute.
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20 On the Mac, relative paths begin with a colon,
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21 but as a special case, paths with no colons at all are also relative.
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22 Anything else is absolute (the string up to the first colon is the
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23 volume name)."""
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24
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25 return ':' in s and s[0] != ':'
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27
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28 def join(s, *p):
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29 path = s
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30 for t in p:
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31 if (not s) or isabs(t):
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32 path = t
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33 continue
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34 if t[:1] == ':':
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35 t = t[1:]
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36 if ':' not in path:
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37 path = ':' + path
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38 if path[-1:] != ':':
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39 path = path + ':'
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40 path = path + t
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41 return path
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43
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44 def split(s):
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45 """Split a pathname into two parts: the directory leading up to the final
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46 bit, and the basename (the filename, without colons, in that directory).
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47 The result (s, t) is such that join(s, t) yields the original argument."""
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48
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49 if ':' not in s: return '', s
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50 colon = 0
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51 for i in range(len(s)):
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52 if s[i] == ':': colon = i + 1
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53 path, file = s[:colon-1], s[colon:]
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54 if path and not ':' in path:
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55 path = path + ':'
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56 return path, file
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57
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58
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59 def splitext(p):
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60 """Split a path into root and extension.
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61 The extension is everything starting at the last dot in the last
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62 pathname component; the root is everything before that.
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63 It is always true that root + ext == p."""
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64
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65 i = p.rfind('.')
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66 if i<=p.rfind(':'):
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67 return p, ''
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68 else:
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69 return p[:i], p[i:]
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72 def splitdrive(p):
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73 """Split a pathname into a drive specification and the rest of the
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74 path. Useful on DOS/Windows/NT; on the Mac, the drive is always
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75 empty (don't use the volume name -- it doesn't have the same
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76 syntactic and semantic oddities as DOS drive letters, such as there
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77 being a separate current directory per drive)."""
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78
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79 return '', p
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81
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82 # Short interfaces to split()
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83
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84 def dirname(s): return split(s)[0]
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85 def basename(s): return split(s)[1]
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86
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87
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88 def isdir(s):
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89 """Return true if the pathname refers to an existing directory."""
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91 try:
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92 st = os.stat(s)
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93 except os.error:
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94 return 0
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95 return S_ISDIR(st.st_mode)
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98 # Get size, mtime, atime of files.
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99
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100 def getsize(filename):
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101 """Return the size of a file, reported by os.stat()."""
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102 return os.stat(filename).st_size
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103
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104 def getmtime(filename):
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105 """Return the last modification time of a file, reported by os.stat()."""
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106 return os.stat(filename).st_mtime
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107
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108 def getatime(filename):
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109 """Return the last access time of a file, reported by os.stat()."""
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110 return os.stat(filename).st_atime
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111
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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 macfs
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118 return macfs.ResolveAliasFile(s)[2]
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119 except:
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120 return False
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121
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122
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123 def isfile(s):
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124 """Return true if the pathname refers to an existing regular file."""
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125
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126 try:
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127 st = os.stat(s)
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128 except os.error:
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129 return False
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130 return S_ISREG(st.st_mode)
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131
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132 def getctime(filename):
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133 """Return the creation time of a file, reported by os.stat()."""
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134 return os.stat(filename).st_ctime
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parents: 103
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135
103
1229ba124e0b Initial revision
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parents:
diff changeset
136 def exists(s):
22830
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parents: 22704
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137 """Return True if the pathname refers to an existing file or directory."""
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138
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139 try:
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parents: 11137
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140 st = os.stat(s)
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Guido van Rossum <guido@python.org>
parents: 11137
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141 except os.error:
22830
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Tim Peters <tim.peters@gmail.com>
parents: 22704
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142 return False
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Tim Peters <tim.peters@gmail.com>
parents: 22704
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143 return True
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144
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parents: 13876
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145 # Return the longest prefix of all list elements.
039583c090c4 Restored commonprefix() semantics.
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parents: 13876
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146
039583c090c4 Restored commonprefix() semantics.
Jack Jansen <jack.jansen@cwi.nl>
parents: 13876
diff changeset
147 def commonprefix(m):
039583c090c4 Restored commonprefix() semantics.
Jack Jansen <jack.jansen@cwi.nl>
parents: 13876
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148 "Given a list of pathnames, returns the longest common leading component"
039583c090c4 Restored commonprefix() semantics.
Jack Jansen <jack.jansen@cwi.nl>
parents: 13876
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149 if not m: return ''
039583c090c4 Restored commonprefix() semantics.
Jack Jansen <jack.jansen@cwi.nl>
parents: 13876
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150 prefix = m[0]
039583c090c4 Restored commonprefix() semantics.
Jack Jansen <jack.jansen@cwi.nl>
parents: 13876
diff changeset
151 for item in m:
039583c090c4 Restored commonprefix() semantics.
Jack Jansen <jack.jansen@cwi.nl>
parents: 13876
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152 for i in range(len(prefix)):
15543
785155e2cfca Update the code to better reflect recommended style:
Fred Drake <fdrake@acm.org>
parents: 14910
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153 if prefix[:i+1] != item[:i+1]:
14128
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Jack Jansen <jack.jansen@cwi.nl>
parents: 13876
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154 prefix = prefix[:i]
039583c090c4 Restored commonprefix() semantics.
Jack Jansen <jack.jansen@cwi.nl>
parents: 13876
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155 if i == 0: return ''
039583c090c4 Restored commonprefix() semantics.
Jack Jansen <jack.jansen@cwi.nl>
parents: 13876
diff changeset
156 break
039583c090c4 Restored commonprefix() semantics.
Jack Jansen <jack.jansen@cwi.nl>
parents: 13876
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157 return prefix
3299
47763ac44c48 Added (dummy) expanduser and expandvar methods
Jack Jansen <jack.jansen@cwi.nl>
parents: 2947
diff changeset
158
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159 def expandvars(path):
b6f52c1ef6da More trivial comment -> docstring transformations by Ka-Ping Yee,
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parents: 11137
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160 """Dummy to retain interface-compatibility with other operating systems."""
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parents: 11137
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161 return path
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162
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163
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Guido van Rossum <guido@python.org>
parents: 11137
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164 def expanduser(path):
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Guido van Rossum <guido@python.org>
parents: 11137
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165 """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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166 return path
2947
a980d076052d added normpath() and splitdrive()
Guido van Rossum <guido@python.org>
parents: 2910
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167
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18dccdf2c46d Use docstrings for exception classes
Neal Norwitz <nnorwitz@gmail.com>
parents: 22702
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168 class norm_error(Exception):
18dccdf2c46d Use docstrings for exception classes
Neal Norwitz <nnorwitz@gmail.com>
parents: 22702
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169 """Path cannot be normalized"""
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170
db817f3a1c65 * change default line numbers for 'list' in pdb.py
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parents: 770
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171 def normpath(s):
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1c00fea9ae40 Rewrite of normpath() by Corran Webster, so trailing :s are removed
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parents: 13577
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172 """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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173 equivalent paths."""
1c00fea9ae40 Rewrite of normpath() by Corran Webster, so trailing :s are removed
Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
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174
1c00fea9ae40 Rewrite of normpath() by Corran Webster, so trailing :s are removed
Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
diff changeset
175 if ":" not in s:
1c00fea9ae40 Rewrite of normpath() by Corran Webster, so trailing :s are removed
Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
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176 return ":"+s
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177
14910
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Fred Drake <fdrake@acm.org>
parents: 14128
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178 comps = s.split(":")
13876
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Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
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179 i = 1
1c00fea9ae40 Rewrite of normpath() by Corran Webster, so trailing :s are removed
Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
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180 while i < len(comps)-1:
1c00fea9ae40 Rewrite of normpath() by Corran Webster, so trailing :s are removed
Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
diff changeset
181 if comps[i] == "" and comps[i-1] != "":
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Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
diff changeset
182 if i > 1:
1c00fea9ae40 Rewrite of normpath() by Corran Webster, so trailing :s are removed
Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
diff changeset
183 del comps[i-1:i+1]
14910
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parents: 14128
diff changeset
184 i = i - 1
13876
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Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
diff changeset
185 else:
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Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
diff changeset
186 # best way to handle this is to raise an exception
19080
27b4dbd428fe Typo fix (spelling mistake in error message).
Greg Ward <gward@python.net>
parents: 16198
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187 raise norm_error, 'Cannot use :: immediately after volume name'
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parents: 11137
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188 else:
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parents: 13577
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189 i = i + 1
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parents: 13577
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190
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parents: 14128
diff changeset
191 s = ":".join(comps)
13876
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parents: 13577
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192
1c00fea9ae40 Rewrite of normpath() by Corran Webster, so trailing :s are removed
Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
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193 # remove trailing ":" except for ":" and "Volume:"
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Jack Jansen <jack.jansen@cwi.nl>
parents: 13577
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194 if s[-1] == ":" and len(comps) > 2 and s != ":"*len(s):
1c00fea9ae40 Rewrite of normpath() by Corran Webster, so trailing :s are removed
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parents: 13577
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195 s = s[:-1]
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196 return s
2910
5a2612fb6c0e Added missing walk() function
Jack Jansen <jack.jansen@cwi.nl>
parents: 2260
diff changeset
197
2947
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Guido van Rossum <guido@python.org>
parents: 2910
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198
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199 def walk(top, func, arg):
20361
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Tim Peters <tim.peters@gmail.com>
parents: 19934
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200 """Directory tree walk with callback function.
c408333d37f0 SF bug [#469732] os.path.walk docstring inconsistent.
Tim Peters <tim.peters@gmail.com>
parents: 19934
diff changeset
201
c408333d37f0 SF bug [#469732] os.path.walk docstring inconsistent.
Tim Peters <tim.peters@gmail.com>
parents: 19934
diff changeset
202 For each directory in the directory tree rooted at top (including top
c408333d37f0 SF bug [#469732] os.path.walk docstring inconsistent.
Tim Peters <tim.peters@gmail.com>
parents: 19934
diff changeset
203 itself, but excluding '.' and '..'), call func(arg, dirname, fnames).
c408333d37f0 SF bug [#469732] os.path.walk docstring inconsistent.
Tim Peters <tim.peters@gmail.com>
parents: 19934
diff changeset
204 dirname is the name of the directory, and fnames a list of the names of
c408333d37f0 SF bug [#469732] os.path.walk docstring inconsistent.
Tim Peters <tim.peters@gmail.com>
parents: 19934
diff changeset
205 the files and subdirectories in dirname (excluding '.' and '..'). func
c408333d37f0 SF bug [#469732] os.path.walk docstring inconsistent.
Tim Peters <tim.peters@gmail.com>
parents: 19934
diff changeset
206 may modify the fnames list in-place (e.g. via del or slice assignment),
c408333d37f0 SF bug [#469732] os.path.walk docstring inconsistent.
Tim Peters <tim.peters@gmail.com>
parents: 19934
diff changeset
207 and walk will only recurse into the subdirectories whose names remain in
c408333d37f0 SF bug [#469732] os.path.walk docstring inconsistent.
Tim Peters <tim.peters@gmail.com>
parents: 19934
diff changeset
208 fnames; this can be used to implement a filter, or to impose a specific
c408333d37f0 SF bug [#469732] os.path.walk docstring inconsistent.
Tim Peters <tim.peters@gmail.com>
parents: 19934
diff changeset
209 order of visiting. No semantics are defined for, or required of, arg,
c408333d37f0 SF bug [#469732] os.path.walk docstring inconsistent.
Tim Peters <tim.peters@gmail.com>
parents: 19934
diff changeset
210 beyond that arg is always passed to func. It can be used, e.g., to pass
c408333d37f0 SF bug [#469732] os.path.walk docstring inconsistent.
Tim Peters <tim.peters@gmail.com>
parents: 19934
diff changeset
211 a filename pattern, or a mutable object designed to accumulate
c408333d37f0 SF bug [#469732] os.path.walk docstring inconsistent.
Tim Peters <tim.peters@gmail.com>
parents: 19934
diff changeset
212 statistics. Passing None for arg is common."""
2910
5a2612fb6c0e Added missing walk() function
Jack Jansen <jack.jansen@cwi.nl>
parents: 2260
diff changeset
213
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diff changeset
214 try:
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parents: 11137
diff changeset
215 names = os.listdir(top)
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Guido van Rossum <guido@python.org>
parents: 11137
diff changeset
216 except os.error:
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Guido van Rossum <guido@python.org>
parents: 11137
diff changeset
217 return
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parents: 11137
diff changeset
218 func(arg, top, names)
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Guido van Rossum <guido@python.org>
parents: 11137
diff changeset
219 for name in names:
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parents: 11137
diff changeset
220 name = join(top, name)
23220
bd08c6955e9b Fixes based on ideas from Christopher Smith:
Jack Jansen <jack.jansen@cwi.nl>
parents: 22867
diff changeset
221 if isdir(name) and not islink(name):
11706
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parents: 11137
diff changeset
222 walk(name, func, arg)
10018
d7979f4ed2b6 Add abspath()
Guido van Rossum <guido@python.org>
parents: 8746
diff changeset
223
d7979f4ed2b6 Add abspath()
Guido van Rossum <guido@python.org>
parents: 8746
diff changeset
224
d7979f4ed2b6 Add abspath()
Guido van Rossum <guido@python.org>
parents: 8746
diff changeset
225 def abspath(path):
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parents: 11137
diff changeset
226 """Return an absolute path."""
10018
d7979f4ed2b6 Add abspath()
Guido van Rossum <guido@python.org>
parents: 8746
diff changeset
227 if not isabs(path):
d7979f4ed2b6 Add abspath()
Guido van Rossum <guido@python.org>
parents: 8746
diff changeset
228 path = join(os.getcwd(), path)
d7979f4ed2b6 Add abspath()
Guido van Rossum <guido@python.org>
parents: 8746
diff changeset
229 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
230
f2f25a738f7f SF patch #461781 by Chris Lawrence: os.path.realpath - Resolve symlinks:
Guido van Rossum <guido@python.org>
parents: 19080
diff changeset
231 # realpath is a no-op on systems without islink support
23220
bd08c6955e9b Fixes based on ideas from Christopher Smith:
Jack Jansen <jack.jansen@cwi.nl>
parents: 22867
diff changeset
232 def realpath(path):
23521
a90faa5f9417 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 23237
diff changeset
233 path = abspath(path)
a90faa5f9417 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 23237
diff changeset
234 try:
a90faa5f9417 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 23237
diff changeset
235 import macfs
a90faa5f9417 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 23237
diff changeset
236 except ImportError:
a90faa5f9417 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 23237
diff changeset
237 return path
a90faa5f9417 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 23237
diff changeset
238 if not path:
a90faa5f9417 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 23237
diff changeset
239 return path
a90faa5f9417 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 23237
diff changeset
240 components = path.split(':')
a90faa5f9417 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 23237
diff changeset
241 path = components[0] + ':'
a90faa5f9417 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 23237
diff changeset
242 for c in components[1:]:
a90faa5f9417 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 23237
diff changeset
243 path = join(path, c)
a90faa5f9417 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 23237
diff changeset
244 path = macfs.ResolveAliasFile(path)[0].as_pathname()
a90faa5f9417 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 23237
diff changeset
245 return path
25666
4a825b902310 Add os.path.supports_unicode_filenames for all platforms,
Mark Hammond <mhammond@skippinet.com.au>
parents: 23625
diff changeset
246
4a825b902310 Add os.path.supports_unicode_filenames for all platforms,
Mark Hammond <mhammond@skippinet.com.au>
parents: 23625
diff changeset
247 supports_unicode_filenames = False