• I have marked all applicable categories:
  • exception-raising bug
  • RL algorithm bug
  • system worker bug
  • system utils bug
  • code design/refactor
  • documentation request
  • new feature request
• I have visited the readme and doc
• I have searched through the issue tracker and pr tracker
• I have mentioned version numbers, operating system and environment, where applicable:

  import ding, torch, sys
  print(ding.__version__, torch.__version__, sys.version, sys.platform)
v0.5.2 2.5.1+cu124 3.9.21 (main, Dec 11 2024, 16:24:11) 
[GCC 11.2.0] linux

在编写自定义环境时，参考ding/envs/env/tests/test_env_implementation_check.py文件对环境进行测试，报错：

  File "~/envs/lib/python3.9/site-packages/ding/envs/env/env_implementation_check.py", line 36, in check_array_space
    assert (space.low <= ndarray).all() and (ndarray <= space.high).all(
AttributeError: 'MultiDiscrete' object has no attribute 'low'

动作空间是离散连续混合动作，定义如下：

self.action_space = spaces.Tuple((
            spaces.MultiDiscrete(np.array([self.ch_num + 1] * self.user_num)),
            spaces.Box(low=0, high=1, shape=(1, self.user_num),dtype='float32')))

MultiDiscrete对象默认的下限值low是0，但是它没有low这个属性。
有什么解决思路嘛？