Mercurial > cpython-lru_cache-weakref

annotate Lib/lib2to3/fixes/fix_isinstance.py @ 80661:94de77bd0b4b 2.7

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Issue #16194: document imp.load_dynamic problems when read several extension modules from the same binary object file.
author Andrew Svetlov <andrew.svetlov@gmail.com>
date Thu, 29 Nov 2012 19:51:28 +0200
parents b36cb4602e21
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # Copyright 2008 Armin Ronacher.
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2 # Licensed to PSF under a Contributor Agreement.
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3
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4 """Fixer that cleans up a tuple argument to isinstance after the tokens
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5 in it were fixed. This is mainly used to remove double occurrences of
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6 tokens as a leftover of the long -> int / unicode -> str conversion.
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7
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8 eg. isinstance(x, (int, long)) -> isinstance(x, (int, int))
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9 -> isinstance(x, int)
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10 """
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11
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12 from .. import fixer_base
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13 from ..fixer_util import token
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14
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15
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16 class FixIsinstance(fixer_base.BaseFix):
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7d1e453b120b Merged revisions 83852-83853,83857,84042,84216,84274-84276,84375,85388,85478,85506-85508 via svnmerge from
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17 BM_compatible = True
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18 PATTERN = """
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19 power<
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20 'isinstance'
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21 trailer< '(' arglist< any ',' atom< '('
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22 args=testlist_gexp< any+ >
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23 ')' > > ')' >
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24 >
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25 """
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26
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27 run_order = 6
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28
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29 def transform(self, node, results):
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30 names_inserted = set()
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31 testlist = results["args"]
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32 args = testlist.children
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33 new_args = []
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34 iterator = enumerate(args)
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35 for idx, arg in iterator:
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36 if arg.type == token.NAME and arg.value in names_inserted:
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37 if idx < len(args) - 1 and args[idx + 1].type == token.COMMA:
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38 iterator.next()
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39 continue
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40 else:
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41 new_args.append(arg)
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42 if arg.type == token.NAME:
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43 names_inserted.add(arg.value)
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44 if new_args and new_args[-1].type == token.COMMA:
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45 del new_args[-1]
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46 if len(new_args) == 1:
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47 atom = testlist.parent
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48 new_args[0].prefix = atom.prefix
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49 atom.replace(new_args[0])
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50 else:
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51 args[:] = new_args
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52 node.changed()