/Lib/lib2to3/fixes/fix_callable.py
http://unladen-swallow.googlecode.com/ · Python · 31 lines · 26 code · 1 blank · 4 comment · 0 complexity · 37990663703ff5ea2fabb3095a9ad189 MD5 · raw file
- # Copyright 2007 Google, Inc. All Rights Reserved.
- # Licensed to PSF under a Contributor Agreement.
- """Fixer for callable().
- This converts callable(obj) into hasattr(obj, '__call__')."""
- # Local imports
- from .. import pytree
- from .. import fixer_base
- from ..fixer_util import Call, Name, String
- class FixCallable(fixer_base.BaseFix):
- # Ignore callable(*args) or use of keywords.
- # Either could be a hint that the builtin callable() is not being used.
- PATTERN = """
- power< 'callable'
- trailer< lpar='('
- ( not(arglist | argument<any '=' any>) func=any
- | func=arglist<(not argument<any '=' any>) any ','> )
- rpar=')' >
- after=any*
- >
- """
- def transform(self, node, results):
- func = results["func"]
- args = [func.clone(), String(', '), String("'__call__'")]
- return Call(Name("hasattr"), args, prefix=node.get_prefix())