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- """
- Fixer that changes zip(seq0, seq1, ...) into list(zip(seq0, seq1, ...)
- unless there exists a 'from future_builtins import zip' statement in the
- top-level namespace.
- We avoid the transformation if the zip() call is directly contained in
- iter(<>), list(<>), tuple(<>), sorted(<>), ...join(<>), or for V in <>:.
- """
- # Local imports
- from .. import fixer_base
- from ..pytree import Node
- from ..pygram import python_symbols as syms
- from ..fixer_util import Name, ArgList, in_special_context
- class FixZip(fixer_base.ConditionalFix):
- BM_compatible = True
- PATTERN = """
- power< 'zip' args=trailer< '(' [any] ')' > [trailers=trailer*]
- >
- """
- skip_on = "future_builtins.zip"
- def transform(self, node, results):
- if self.should_skip(node):
- return
- if in_special_context(node):
- return None
- args = results['args'].clone()
- args.prefix = ""
- trailers = []
- if 'trailers' in results:
- trailers = [n.clone() for n in results['trailers']]
- for n in trailers:
- n.prefix = ""
- new = Node(syms.power, [Name("zip"), args], prefix="")
- new = Node(syms.power, [Name("list"), ArgList([new])] + trailers)
- new.prefix = node.prefix
- return new
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