41 lines
1.5 KiB
Python
41 lines
1.5 KiB
Python
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"""Fixer for operator.{isCallable,sequenceIncludes}
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operator.isCallable(obj) -> hasattr(obj, '__call__')
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operator.sequenceIncludes(obj) -> operator.contains(obj)
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"""
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# Local imports
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from .. import fixer_base
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from ..fixer_util import Call, Name, String
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class FixOperator(fixer_base.BaseFix):
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methods = "method=('isCallable'|'sequenceIncludes')"
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func = "'(' func=any ')'"
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PATTERN = """
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power< module='operator'
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trailer< '.' {methods} > trailer< {func} > >
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power< {methods} trailer< {func} > >
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""".format(methods=methods, func=func)
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def transform(self, node, results):
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method = results["method"][0]
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if method.value == u"sequenceIncludes":
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if "module" not in results:
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# operator may not be in scope, so we can't make a change.
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self.warning(node, "You should use operator.contains here.")
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else:
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method.value = u"contains"
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method.changed()
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elif method.value == u"isCallable":
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if "module" not in results:
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self.warning(node,
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"You should use hasattr(%s, '__call__') here." %
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results["func"].value)
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else:
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func = results["func"]
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args = [func.clone(), String(u", "), String(u"'__call__'")]
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return Call(Name(u"hasattr"), args, prefix=node.prefix)
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