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: /proc/thread-self/root/usr/lib/python3.9/lib2to3/fixes/ [ drwxr-xr-x ]
name : fix_isinstance.py # 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()