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annotate Lib/lib2to3/fixes/fix_exec.py @ 79675:c0a2294de787 2.7

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Issue #16199: Backport 2to3 typo fix from 3.2.
author Chris Jerdonek <chris.jerdonek@gmail.com>
date Thu, 11 Oct 2012 16:15:46 -0700
parents b36cb4602e21
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # Copyright 2006 Google, Inc. All Rights Reserved.
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2 # Licensed to PSF under a Contributor Agreement.
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3
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4 """Fixer for exec.
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5
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6 This converts usages of the exec statement into calls to a built-in
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7 exec() function.
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8
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9 exec code in ns1, ns2 -> exec(code, ns1, ns2)
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10 """
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11
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12 # Local imports
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13 from .. import pytree
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14 from .. import fixer_base
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15 from ..fixer_util import Comma, Name, Call
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16
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17
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18 class FixExec(fixer_base.BaseFix):
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19 BM_compatible = True
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20
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21 PATTERN = """
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22 exec_stmt< 'exec' a=any 'in' b=any [',' c=any] >
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23 |
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24 exec_stmt< 'exec' (not atom<'(' [any] ')'>) a=any >
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25 """
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26
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27 def transform(self, node, results):
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28 assert results
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29 syms = self.syms
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30 a = results["a"]
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31 b = results.get("b")
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32 c = results.get("c")
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33 args = [a.clone()]
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34 args[0].prefix = ""
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35 if b is not None:
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36 args.extend([Comma(), b.clone()])
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37 if c is not None:
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38 args.extend([Comma(), c.clone()])
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39
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40 return Call(Name(u"exec"), args, prefix=node.prefix)