Mercurial > cpython-lru_cache-weakref

annotate Tools/scripts/which.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 6cfe2982de42
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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fcfe324663a6 convert shebang lines: python -> python3
Benjamin Peterson <benjamin@python.org>
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1 #! /usr/bin/env python3
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2
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3 # Variant of "which".
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4 # On stderr, near and total misses are reported.
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5 # '-l<flags>' argument adds ls -l<flags> of each file found.
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6
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7 import sys
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8 if sys.path[0] in (".", ""): del sys.path[0]
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9
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10 import sys, os
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11 from stat import *
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12
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13 def msg(str):
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14 sys.stderr.write(str + '\n')
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15
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16 def main():
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17 pathlist = os.environ['PATH'].split(os.pathsep)
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18
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19 sts = 0
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20 longlist = ''
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21
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22 if sys.argv[1:] and sys.argv[1][:2] == '-l':
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23 longlist = sys.argv[1]
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24 del sys.argv[1]
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25
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26 for prog in sys.argv[1:]:
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27 ident = ()
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28 for dir in pathlist:
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29 filename = os.path.join(dir, prog)
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30 try:
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31 st = os.stat(filename)
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32 except OSError:
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33 continue
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34 if not S_ISREG(st[ST_MODE]):
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35 msg(filename + ': not a disk file')
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36 else:
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37 mode = S_IMODE(st[ST_MODE])
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38 if mode & 0o111:
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39 if not ident:
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40 print(filename)
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41 ident = st[:3]
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42 else:
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43 if st[:3] == ident:
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44 s = 'same as: '
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45 else:
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46 s = 'also: '
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47 msg(s + filename)
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48 else:
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49 msg(filename + ': not executable')
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50 if longlist:
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51 sts = os.system('ls ' + longlist + ' ' + filename)
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52 if sts: msg('"ls -l" exit status: ' + repr(sts))
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53 if not ident:
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54 msg(prog + ': not found')
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55 sts = 1
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56
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57 sys.exit(sts)
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58
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59 if __name__ == '__main__':
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60 main()