32 lines
938 B
Python
32 lines
938 B
Python
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# Copyright 2007 Google, Inc. All Rights Reserved.
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# Licensed to PSF under a Contributor Agreement.
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"""Fixer for callable().
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This converts callable(obj) into hasattr(obj, '__call__')."""
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# Local imports
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from .. import pytree
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from . import basefix
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from .util import Call, Name, String
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class FixCallable(basefix.BaseFix):
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# Ignore callable(*args) or use of keywords.
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# Either could be a hint that the builtin callable() is not being used.
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PATTERN = """
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power< 'callable'
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trailer< lpar='('
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( not(arglist | argument<any '=' any>) func=any
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| func=arglist<(not argument<any '=' any>) any ','> )
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rpar=')' >
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after=any*
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>
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"""
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def transform(self, node, results):
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func = results["func"]
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args = [func.clone(), String(', '), String("'__call__'")]
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return Call(Name("hasattr"), args, prefix=node.get_prefix())
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