Mercurial > cpython-lru_cache-weakref

annotate Lib/macurl2path.py @ 87690:66c1c9f32567 default tip

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Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859
author Radomir Dopieralski <devel@sheep.art.pl>
date Tue, 03 Dec 2013 16:02:48 +0100
parents 06b9a9e75a6c
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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4a23cc49e2b0 Actually, the previous batch's comment should have been different;
Guido van Rossum <guido@python.org>
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1 """Macintosh-specific module for conversion between pathnames and URLs.
4a23cc49e2b0 Actually, the previous batch's comment should have been different;
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parents: 10889
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2
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3 Do not import directly; use urllib instead."""
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4
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5 import urllib.parse
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6 import os
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7
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8 __all__ = ["url2pathname","pathname2url"]
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9
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10 def url2pathname(pathname):
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11 """OS-specific conversion from a relative URL of the 'file' scheme
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12 to a file system path; not recommended for general use."""
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13 #
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14 # XXXX The .. handling should be fixed...
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15 #
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16 tp = urllib.parse.splittype(pathname)[0]
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17 if tp and tp != 'file':
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18 raise RuntimeError('Cannot convert non-local URL to pathname')
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a628c3705897 Jack Jansen's patch to support file:///path/file/name URL syntax.
Guido van Rossum <guido@python.org>
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19 # Turn starting /// into /, an empty hostname means current host
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20 if pathname[:3] == '///':
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21 pathname = pathname[2:]
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22 elif pathname[:2] == '//':
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23 raise RuntimeError('Cannot convert non-local URL to pathname')
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24 components = pathname.split('/')
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25 # Remove . and embedded ..
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26 i = 0
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27 while i < len(components):
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28 if components[i] == '.':
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29 del components[i]
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30 elif components[i] == '..' and i > 0 and \
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31 components[i-1] not in ('', '..'):
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32 del components[i-1:i+1]
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33 i = i-1
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parents: 11708
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34 elif components[i] == '' and i > 0 and components[i-1] != '':
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35 del components[i]
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36 else:
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37 i = i+1
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38 if not components[0]:
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39 # Absolute unix path, don't start with colon
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40 rv = ':'.join(components[1:])
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41 else:
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42 # relative unix path, start with colon. First replace
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43 # leading .. by empty strings (giving ::file)
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44 i = 0
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45 while i < len(components) and components[i] == '..':
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46 components[i] = ''
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47 i = i + 1
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48 rv = ':' + ':'.join(components)
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49 # and finally unquote slashes and other funny characters
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parents: 48334
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50 return urllib.parse.unquote(rv)
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51
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52 def pathname2url(pathname):
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Georg Brandl <georg@python.org>
parents: 31515
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53 """OS-specific conversion from a file system path to a relative URL
536f24e16af2 Bug #649974: make docstrings for url2pathname consistent
Georg Brandl <georg@python.org>
parents: 31515
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54 of the 'file' scheme; not recommended for general use."""
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55 if '/' in pathname:
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parents: 40775
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56 raise RuntimeError("Cannot convert pathname containing slashes")
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57 components = pathname.split(':')
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58 # Remove empty first and/or last component
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59 if components[0] == '':
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60 del components[0]
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parents: 4412
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61 if components[-1] == '':
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62 del components[-1]
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63 # Replace empty string ('::') by .. (will result in '/../' later)
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parents: 4412
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64 for i in range(len(components)):
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65 if components[i] == '':
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66 components[i] = '..'
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67 # Truncate names longer than 31 bytes
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68 components = map(_pncomp2url, components)
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69
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70 if os.path.isabs(pathname):
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71 return '/' + '/'.join(components)
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72 else:
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73 return '/'.join(components)
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parents: 15543
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74
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parents: 7755
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75 def _pncomp2url(component):
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parents: 43020
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76 # We want to quote slashes
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parents: 48334
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77 return urllib.parse.quote(component[:31], safe='')