diff options
Diffstat (limited to 'lib/python2.7/lib2to3/fixes/fix_has_key.py')
-rw-r--r-- | lib/python2.7/lib2to3/fixes/fix_has_key.py | 110 |
1 files changed, 0 insertions, 110 deletions
diff --git a/lib/python2.7/lib2to3/fixes/fix_has_key.py b/lib/python2.7/lib2to3/fixes/fix_has_key.py deleted file mode 100644 index bead4cb..0000000 --- a/lib/python2.7/lib2to3/fixes/fix_has_key.py +++ /dev/null @@ -1,110 +0,0 @@ -# Copyright 2006 Google, Inc. All Rights Reserved. -# Licensed to PSF under a Contributor Agreement. - -"""Fixer for has_key(). - -Calls to .has_key() methods are expressed in terms of the 'in' -operator: - - d.has_key(k) -> k in d - -CAVEATS: -1) While the primary target of this fixer is dict.has_key(), the - fixer will change any has_key() method call, regardless of its - class. - -2) Cases like this will not be converted: - - m = d.has_key - if m(k): - ... - - Only *calls* to has_key() are converted. While it is possible to - convert the above to something like - - m = d.__contains__ - if m(k): - ... - - this is currently not done. -""" - -# Local imports -from .. import pytree -from ..pgen2 import token -from .. import fixer_base -from ..fixer_util import Name, parenthesize - - -class FixHasKey(fixer_base.BaseFix): - BM_compatible = True - - PATTERN = """ - anchor=power< - before=any+ - trailer< '.' 'has_key' > - trailer< - '(' - ( not(arglist | argument<any '=' any>) arg=any - | arglist<(not argument<any '=' any>) arg=any ','> - ) - ')' - > - after=any* - > - | - negation=not_test< - 'not' - anchor=power< - before=any+ - trailer< '.' 'has_key' > - trailer< - '(' - ( not(arglist | argument<any '=' any>) arg=any - | arglist<(not argument<any '=' any>) arg=any ','> - ) - ')' - > - > - > - """ - - def transform(self, node, results): - assert results - syms = self.syms - if (node.parent.type == syms.not_test and - self.pattern.match(node.parent)): - # Don't transform a node matching the first alternative of the - # pattern when its parent matches the second alternative - return None - negation = results.get("negation") - anchor = results["anchor"] - prefix = node.prefix - before = [n.clone() for n in results["before"]] - arg = results["arg"].clone() - after = results.get("after") - if after: - after = [n.clone() for n in after] - if arg.type in (syms.comparison, syms.not_test, syms.and_test, - syms.or_test, syms.test, syms.lambdef, syms.argument): - arg = parenthesize(arg) - if len(before) == 1: - before = before[0] - else: - before = pytree.Node(syms.power, before) - before.prefix = u" " - n_op = Name(u"in", prefix=u" ") - if negation: - n_not = Name(u"not", prefix=u" ") - n_op = pytree.Node(syms.comp_op, (n_not, n_op)) - new = pytree.Node(syms.comparison, (arg, n_op, before)) - if after: - new = parenthesize(new) - new = pytree.Node(syms.power, (new,) + tuple(after)) - if node.parent.type in (syms.comparison, syms.expr, syms.xor_expr, - syms.and_expr, syms.shift_expr, - syms.arith_expr, syms.term, - syms.factor, syms.power): - new = parenthesize(new) - new.prefix = prefix - return new |