def _set_type(self, other_type=ANY_TYPE, signature=None):
        assert isinstance(other_type, Type)

        if signature is None:
            signature = defaultdict(list)

        if not other_type.matches(TRUTH_TYPE):
            raise IllegalTypeException(self, other_type, TRUTH_TYPE)
        self.first._set_type(TRUTH_TYPE, signature)
        self.second._set_type(TRUTH_TYPE, signature)
Begins by playing C, then plays D for mem_length rounds if the opponent
dataset/ETHPy150Open nltk/nltk/nltk/sem/logic.py/BooleanExpression._set_type--crossover with--dataset/ETHPy150Open Axelrod-Python/Axelrod/axelrod/strategies/oncebitten.py/OnceBitten.strategy