powers.py 文件源码

def consume_power_up(self, power_up):
        if isinstance(power_up, CryptoPowerUp):
            power_up_class = power_up.__class__
            power_up_instance = power_up
        elif CryptoPowerUp in inspect.getmro(power_up):
            power_up_class = power_up
            power_up_instance = power_up()
        else:
            raise TypeError(
                ("power_up must be a subclass of CryptoPowerUp or an instance "
                 "of a subclass of CryptoPowerUp."))
        self._power_ups[power_up_class] = power_up_instance

        if power_up.confers_public_key:
            # TODO: Make this an ID for later lookup on a KeyStore.
            self.public_keys[
                power_up_class] = power_up_instance.public_key()