| """ |
| 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 |
