(self, pickle_dict)
Unpickle.
Unpickle.
Unpickle .
def __setstate__(self, pickle_dict):
        """Unpickle."""
        self.__dict__.update(pickle_dict)
        self.step = lambda token: None
def __setstate__ ( self , pickle_dict ) : self . __dict__ . update ( pickle_dict ) self . step = lambda token : None