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enumerate only requires an iterable (closes #16573) 

Patch by Jonathan Kotta.
This commit is contained in:
Benjamin Peterson 2012-11-29 10:55:22 -05:00
parent 718df1d638
commit 57af38700a
2 changed files with 18 additions and 6 deletions
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12
Lib/lib2to3/fixer_util.py
View File

@ -165,7 +165,7 @@ def parenthesize(node):
consuming_calls = set(["sorted", "list", "set", "any", "all", "tuple", "sum",
"min", "max"])
"min", "max", "enumerate"])
def attr_chain(obj, attr):
"""Follow an attribute chain.
@ -192,14 +192,14 @@ p0 = """for_stmt< 'for' any 'in' node=any ':' any* >
p1 = """
power<
( 'iter' | 'list' | 'tuple' | 'sorted' | 'set' | 'sum' |
'any' | 'all' | (any* trailer< '.' 'join' >) )
'any' | 'all' | 'enumerate' | (any* trailer< '.' 'join' >) )
trailer< '(' node=any ')' >
any*
>
"""
p2 = """
power<
'sorted'
( 'sorted' | 'enumerate' )
trailer< '(' arglist<node=any any*> ')' >
any*
>
@ -207,14 +207,14 @@ power<
pats_built = False
def in_special_context(node):
""" Returns true if node is in an environment where all that is required
of it is being itterable (ie, it doesn't matter if it returns a list
or an itterator).
of it is being iterable (ie, it doesn't matter if it returns a list
or an iterator).
See test_map_nochange in test_fixers.py for some examples and tests.
"""
global p0, p1, p2, pats_built
if not pats_built:
p1 = patcomp.compile_pattern(p1)
p0 = patcomp.compile_pattern(p0)
p1 = patcomp.compile_pattern(p1)
p2 = patcomp.compile_pattern(p2)
pats_built = True
patterns = [p0, p1, p2]

12
Lib/lib2to3/tests/test_fixers.py
View File

@ -2981,6 +2981,10 @@ class Test_filter(FixerTestCase):
self.unchanged(a)
a = """sorted(filter(f, 'abc'), key=blah)[0]"""
self.unchanged(a)
a = """enumerate(filter(f, 'abc'))"""
self.unchanged(a)
a = """enumerate(filter(f, 'abc'), start=1)"""
self.unchanged(a)
a = """for i in filter(f, 'abc'): pass"""
self.unchanged(a)
a = """[x for x in filter(f, 'abc')]"""
@ -3089,6 +3093,10 @@ class Test_map(FixerTestCase):
self.unchanged(a)
a = """sorted(map(f, 'abc'), key=blah)[0]"""
self.unchanged(a)
a = """enumerate(map(f, 'abc'))"""
self.unchanged(a)
a = """enumerate(map(f, 'abc'), start=1)"""
self.unchanged(a)
a = """for i in map(f, 'abc'): pass"""
self.unchanged(a)
a = """[x for x in map(f, 'abc')]"""
@ -3152,6 +3160,10 @@ class Test_zip(FixerTestCase):
self.unchanged(a)
a = """sorted(zip(a, b), key=blah)[0]"""
self.unchanged(a)
a = """enumerate(zip(a, b))"""
self.unchanged(a)
a = """enumerate(zip(a, b), start=1)"""
self.unchanged(a)
a = """for i in zip(a, b): pass"""
self.unchanged(a)
a = """[x for x in zip(a, b)]"""