1 # Copyright 2008 Armin Ronacher. 2 # Licensed to PSF under a Contributor Agreement. 3 4 """Fixer that cleans up a tuple argument to isinstance after the tokens 5 in it were fixed. This is mainly used to remove double occurrences of 6 tokens as a leftover of the long -> int / unicode -> str conversion. 7 8 eg. isinstance(x, (int, long)) -> isinstance(x, (int, int)) 9 -> isinstance(x, int) 10 """ 11 12 from .. import fixer_base 13 from ..fixer_util import token 14 15 16 class FixIsinstance(fixer_base.BaseFix): 17 BM_compatible = True 18 PATTERN = """ 19 power< 20 'isinstance' 21 trailer< '(' arglist< any ',' atom< '(' 22 args=testlist_gexp< any+ > 23 ')' > > ')' > 24 > 25 """ 26 27 run_order = 6 28 29 def transform(self, node, results): 30 names_inserted = set() 31 testlist = results["args"] 32 args = testlist.children 33 new_args = [] 34 iterator = enumerate(args) 35 for idx, arg in iterator: 36 if arg.type == token.NAME and arg.value in names_inserted: 37 if idx < len(args) - 1 and args[idx + 1].type == token.COMMA: 38 next(iterator) 39 continue 40 else: 41 new_args.append(arg) 42 if arg.type == token.NAME: 43 names_inserted.add(arg.value) 44 if new_args and new_args[-1].type == token.COMMA: 45 del new_args[-1] 46 if len(new_args) == 1: 47 atom = testlist.parent 48 new_args[0].prefix = atom.prefix 49 atom.replace(new_args[0]) 50 else: 51 args[:] = new_args 52 node.changed() 53
