gym.py 文件源码

def __init__(self, env_name, state_builder=ALEStateBuilder(), repeat_action=4, no_op=30, monitoring_path=None):
        assert isinstance(state_builder, StateBuilder), 'state_builder should inherit from StateBuilder'
        assert isinstance(repeat_action, (int, tuple)), 'repeat_action should be int or tuple'
        if isinstance(repeat_action, int):
            assert repeat_action >= 1, "repeat_action should be >= 1"
        elif isinstance(repeat_action, tuple):
            assert len(repeat_action) == 2, 'repeat_action should be a length-2 tuple: (min frameskip, max frameskip)'
            assert repeat_action[0] < repeat_action[1], 'repeat_action[0] should be < repeat_action[1]'

        super(GymEnvironment, self).__init__()

        self._state_builder = state_builder
        self._env = gym.make(env_name)
        self._env.env.frameskip = repeat_action
        self._no_op = max(0, no_op)
        self._done = True

        if monitoring_path is not None:
            self._env = Monitor(self._env, monitoring_path, video_callable=need_record)