def __setattr__(self, name, value):
        if name is not ("value", "name", "type"):
            raise AttributeError("%s attribute is readonly" % name)
        else:
            self.__dict__[name] = value
dataset/ETHPy150Open deanhiller/databus/webapp/play1.3.x/samples-and-tests/i-am-a-developer/mechanize/ClientForm.py/FileControl.__setattr__/operator `in` -> `is not`