"""

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Fixer that changes zip(seq0, seq1, ...) into list(zip(seq0, seq1, ...)

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unless there exists a 'from future_builtins import zip' statement in the

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top-level namespace.

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We avoid the transformation if the zip() call is directly contained in

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iter(<>), list(<>), tuple(<>), sorted(<>), ...join(<>), or for V in <>:.

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"""

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# Local imports

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from .. import fixer_base

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from ..fixer_util import Name, Call, in_special_context

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class FixZip(fixer_base.ConditionalFix):

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BM_compatible = True

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PATTERN = """

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power< 'zip' args=trailer< '(' [any] ')' >

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>

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"""

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skip_on = "future_builtins.zip"

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def transform(self, node, results):

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if self.should_skip(node):

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return

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if in_special_context(node):

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return None

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new = node.clone()

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new.prefix = u""

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new = Call(Name(u"list"), [new])

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new.prefix = node.prefix

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return new

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