Mercurial > repos > yating-l > jbrowsearchivecreator

annotate test/lib/python2.7/linecache.py @ 3:7d1a9a91b989 draft

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
author yating-l
date Thu, 18 May 2017 18:37:28 -0400
parents
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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1 """Cache lines from files.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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2
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yating-l
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3 This is intended to read lines from modules imported -- hence if a filename
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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4 is not found, it will look down the module search path for a file by
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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5 that name.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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6 """
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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7
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yating-l
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8 import sys
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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9 import os
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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10
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yating-l
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11 __all__ = ["getline", "clearcache", "checkcache"]
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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12
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13 def getline(filename, lineno, module_globals=None):
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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14 lines = getlines(filename, module_globals)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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15 if 1 <= lineno <= len(lines):
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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16 return lines[lineno-1]
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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17 else:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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18 return ''
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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19
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20
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21 # The cache
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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22
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23 cache = {} # The cache
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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25
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26 def clearcache():
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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27 """Clear the cache entirely."""
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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28
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29 global cache
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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30 cache = {}
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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31
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32
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33 def getlines(filename, module_globals=None):
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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34 """Get the lines for a file from the cache.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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35 Update the cache if it doesn't contain an entry for this file already."""
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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36
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37 if filename in cache:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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38 return cache[filename][2]
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39
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40 try:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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41 return updatecache(filename, module_globals)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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42 except MemoryError:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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43 clearcache()
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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44 return []
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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45
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46
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47 def checkcache(filename=None):
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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48 """Discard cache entries that are out of date.
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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49 (This is not checked upon each call!)"""
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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50
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51 if filename is None:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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52 filenames = cache.keys()
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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53 else:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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54 if filename in cache:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
yating-l
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55 filenames = [filename]
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56 else:
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yating-l
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57 return
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58
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59 for filename in filenames:
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60 size, mtime, lines, fullname = cache[filename]
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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61 if mtime is None:
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62 continue # no-op for files loaded via a __loader__
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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63 try:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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64 stat = os.stat(fullname)
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65 except os.error:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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66 del cache[filename]
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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67 continue
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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68 if size != stat.st_size or mtime != stat.st_mtime:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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69 del cache[filename]
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70
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71
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72 def updatecache(filename, module_globals=None):
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73 """Update a cache entry and return its list of lines.
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74 If something's wrong, print a message, discard the cache entry,
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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75 and return an empty list."""
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76
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77 if filename in cache:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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78 del cache[filename]
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79 if not filename or (filename.startswith('<') and filename.endswith('>')):
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80 return []
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81
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82 fullname = filename
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83 try:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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84 stat = os.stat(fullname)
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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85 except OSError:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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86 basename = filename
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87
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88 # Try for a __loader__, if available
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89 if module_globals and '__loader__' in module_globals:
7d1a9a91b989 planemo upload for repository https://github.com/Yating-L/jbrowse-archive-creator.git commit d583ac16a6c6942730ea536eb59cc37941816030-dirty
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90 name = module_globals.get('__name__')
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91 loader = module_globals['__loader__']
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92 get_source = getattr(loader, 'get_source', None)
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93
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94 if name and get_source:
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95 try:
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96 data = get_source(name)
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97 except (ImportError, IOError):
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98 pass
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99 else:
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100 if data is None:
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101 # No luck, the PEP302 loader cannot find the source
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102 # for this module.
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103 return []
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104 cache[filename] = (
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105 len(data), None,
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106 [line+'\n' for line in data.splitlines()], fullname
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107 )
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108 return cache[filename][2]
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109
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110 # Try looking through the module search path, which is only useful
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111 # when handling a relative filename.
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112 if os.path.isabs(filename):
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113 return []
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114
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115 for dirname in sys.path:
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116 # When using imputil, sys.path may contain things other than
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117 # strings; ignore them when it happens.
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118 try:
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119 fullname = os.path.join(dirname, basename)
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120 except (TypeError, AttributeError):
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121 # Not sufficiently string-like to do anything useful with.
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122 continue
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123 try:
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124 stat = os.stat(fullname)
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125 break
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126 except os.error:
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127 pass
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128 else:
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129 return []
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130 try:
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131 with open(fullname, 'rU') as fp:
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132 lines = fp.readlines()
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133 except IOError:
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134 return []
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135 if lines and not lines[-1].endswith('\n'):
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136 lines[-1] += '\n'
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137 size, mtime = stat.st_size, stat.st_mtime
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138 cache[filename] = size, mtime, lines, fullname
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139 return lines