我有一个模拟，可以使用Python代码运行，并希望使用stable-baselines3中的SubProcVecEnv创建多个实例。这使用子处理在不同的核心上运行模拟，在我对代码进行一些更改之前，它就已经工作了。然而，现在我收到下面的错误，不知道如何调试它，因为我不明白是哪部分代码导致了它。有没有办法找出是哪个对象/方法导致了递归深度被超过？我也不记得在代码的任何地方写过递归方法。研究错误消息失败。
/home/philipp/anaconda3/envs/sumo_rl/lib/python3.8/site-packages/gym/logger.py:30: UserWarning: WARN: Box bound precision lowered by casting to float32
Traceback (most recent call last):
File "/home/philipp/anaconda3/envs/sumo_rl/lib/python3.8/site-packages/cloudpickle/cloudpickle_fast.py", line 563, in dump
return Pickler.dump(self, obj)
File "/home/philipp/anaconda3/envs/sumo_rl/lib/python3.8/site-packages/cloudpickle/cloudpickle_fast.py", line 639, in reducer_override
if sys.version_info[:2] < (3, 7) and _is_parametrized_type_hint(obj): # noqa # pragma: no branch
RecursionError: maximum recursion depth exceeded in comparison
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/home/philipp/Code/ba_pw/train.py", line 84, in <module>
venv = utils.make_venv(env_class, network, params, remote_ports, monitor_log_dir)
File "/home/philipp/Code/ba_pw/sumo_rl/utils/utils.py", line 170, in make_venv
return vec_env.SubprocVecEnv(env_fs)
File "/home/philipp/anaconda3/envs/sumo_rl/lib/python3.8/site-packages/stable_baselines3/common/vec_env/subproc_vec_env.py", line 106, in __init__
process.start()
File "/home/philipp/anaconda3/envs/sumo_rl/lib/python3.8/multiprocessing/process.py", line 121, in start
self._popen = self._Popen(self)
File "/home/philipp/anaconda3/envs/sumo_rl/lib/python3.8/multiprocessing/context.py", line 291, in _Popen
return Popen(process_obj)
File "/home/philipp/anaconda3/envs/sumo_rl/lib/python3.8/multiprocessing/popen_forkserver.py", line 35, in __init__
super().__init__(process_obj)
File "/home/philipp/anaconda3/envs/sumo_rl/lib/python3.8/multiprocessing/popen_fork.py", line 19, in __init__
self._launch(process_obj)
File "/home/philipp/anaconda3/envs/sumo_rl/lib/python3.8/multiprocessing/popen_forkserver.py", line 47, in _launch
reduction.dump(process_obj, buf)
File "/home/philipp/anaconda3/envs/sumo_rl/lib/python3.8/multiprocessing/reduction.py", line 60, in dump
ForkingPickler(file, protocol).dump(obj)
File "/home/philipp/anaconda3/envs/sumo_rl/lib/python3.8/site-packages/stable_baselines3/common/vec_env/base_vec_env.py", line 372, in __getstate__
return cloudpickle.dumps(self.var)
File "/home/philipp/anaconda3/envs/sumo_rl/lib/python3.8/site-packages/cloudpickle/cloudpickle_fast.py", line 73, in dumps
cp.dump(obj)
File "/home/philipp/anaconda3/envs/sumo_rl/lib/python3.8/site-packages/cloudpickle/cloudpickle_fast.py", line 570, in dump
raise pickle.PicklingError(msg) from e
_pickle.PicklingError: Could not pickle object as excessively deep recursion required.
我终于用这个问题的答案找到了一个解决方案：
我看起来像是我想要腌制的物体有太多的层次。我打电话给
sys.setrecursionlimit(3000)
现在它起作用了。