| # 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: |
| iterator.next() |
| 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() |
