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# 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 .. 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 = " "
n_op = Name("in", prefix=" ")
if negation:
n_not = Name("not", prefix=" ")
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
| Name | Type | Size | Permission | Actions |
|---|---|---|---|---|
| __pycache__ | Folder | 0755 |
|
|
| __init__.py | File | 47 B | 0644 |
|
| fix_apply.py | File | 2.29 KB | 0644 |
|
| fix_asserts.py | File | 984 B | 0644 |
|
| fix_basestring.py | File | 320 B | 0644 |
|
| fix_buffer.py | File | 590 B | 0644 |
|
| fix_dict.py | File | 3.67 KB | 0644 |
|
| fix_except.py | File | 3.27 KB | 0644 |
|
| fix_exec.py | File | 979 B | 0644 |
|
| fix_execfile.py | File | 2 KB | 0644 |
|
| fix_exitfunc.py | File | 2.44 KB | 0644 |
|
| fix_filter.py | File | 2.7 KB | 0644 |
|
| fix_funcattrs.py | File | 644 B | 0644 |
|
| fix_future.py | File | 547 B | 0644 |
|
| fix_getcwdu.py | File | 451 B | 0644 |
|
| fix_has_key.py | File | 3.12 KB | 0644 |
|
| fix_idioms.py | File | 4.76 KB | 0644 |
|
| fix_import.py | File | 3.18 KB | 0644 |
|
| fix_imports.py | File | 5.55 KB | 0644 |
|
| fix_imports2.py | File | 289 B | 0644 |
|
| fix_input.py | File | 708 B | 0644 |
|
| fix_intern.py | File | 1.12 KB | 0644 |
|
| fix_isinstance.py | File | 1.57 KB | 0644 |
|
| fix_itertools.py | File | 1.51 KB | 0644 |
|
| fix_itertools_imports.py | File | 2.04 KB | 0644 |
|
| fix_long.py | File | 476 B | 0644 |
|
| fix_map.py | File | 3.55 KB | 0644 |
|
| fix_metaclass.py | File | 8 KB | 0644 |
|
| fix_methodattrs.py | File | 606 B | 0644 |
|
| fix_ne.py | File | 571 B | 0644 |
|
| fix_next.py | File | 3.1 KB | 0644 |
|
| fix_nonzero.py | File | 591 B | 0644 |
|
| fix_numliterals.py | File | 768 B | 0644 |
|
| fix_operator.py | File | 3.35 KB | 0644 |
|
| fix_paren.py | File | 1.2 KB | 0644 |
|
| fix_print.py | File | 2.78 KB | 0644 |
|
| fix_raise.py | File | 2.86 KB | 0644 |
|
| fix_raw_input.py | File | 454 B | 0644 |
|
| fix_reduce.py | File | 837 B | 0644 |
|
| fix_reload.py | File | 1.06 KB | 0644 |
|
| fix_renames.py | File | 2.17 KB | 0644 |
|
| fix_repr.py | File | 613 B | 0644 |
|
| fix_set_literal.py | File | 1.66 KB | 0644 |
|
| fix_standarderror.py | File | 449 B | 0644 |
|
| fix_sys_exc.py | File | 1.01 KB | 0644 |
|
| fix_throw.py | File | 1.54 KB | 0644 |
|
| fix_tuple_params.py | File | 5.43 KB | 0644 |
|
| fix_types.py | File | 1.73 KB | 0644 |
|
| fix_unicode.py | File | 1.23 KB | 0644 |
|
| fix_urllib.py | File | 8.17 KB | 0644 |
|
| fix_ws_comma.py | File | 1.06 KB | 0644 |
|
| fix_xrange.py | File | 2.63 KB | 0644 |
|
| fix_xreadlines.py | File | 689 B | 0644 |
|
| fix_zip.py | File | 1.26 KB | 0644 |
|