Spaces:
Running
Running
| # Copyright 2008 Armin Ronacher. | |
| # Licensed to PSF under a Contributor Agreement. | |
| """Fixer that cleans up a tuple argument to isinstance after the tokens | |
| in it were fixed. This is mainly used to remove double occurrences of | |
| tokens as a leftover of the long -> int / unicode -> str conversion. | |
| eg. isinstance(x, (int, long)) -> isinstance(x, (int, int)) | |
| -> isinstance(x, int) | |
| """ | |
| from .. import fixer_base | |
| from ..fixer_util import token | |
| class FixIsinstance(fixer_base.BaseFix): | |
| BM_compatible = True | |
| PATTERN = """ | |
| power< | |
| 'isinstance' | |
| trailer< '(' arglist< any ',' atom< '(' | |
| args=testlist_gexp< any+ > | |
| ')' > > ')' > | |
| > | |
| """ | |
| run_order = 6 | |
| def transform(self, node, results): | |
| names_inserted = set() | |
| testlist = results["args"] | |
| args = testlist.children | |
| new_args = [] | |
| iterator = enumerate(args) | |
| for idx, arg in iterator: | |
| if arg.type == token.NAME and arg.value in names_inserted: | |
| if idx < len(args) - 1 and args[idx + 1].type == token.COMMA: | |
| next(iterator) | |
| continue | |
| else: | |
| new_args.append(arg) | |
| if arg.type == token.NAME: | |
| names_inserted.add(arg.value) | |
| if new_args and new_args[-1].type == token.COMMA: | |
| del new_args[-1] | |
| if len(new_args) == 1: | |
| atom = testlist.parent | |
| new_args[0].prefix = atom.prefix | |
| atom.replace(new_args[0]) | |
| else: | |
| args[:] = new_args | |
| node.changed() | |