Issue with installing OpenAI's Spinning Up on macOS

[SurfingWave]

I’m trying to install the Spinning Up library from OpenAI on my macOS and following the installation steps. However, when I check if it’s properly set up, I run into issues.

I executed the following command:

python -m spinup.run ppo --hid [32,32] --env Walker2d-v2 --exp_name installtest

Yet, I encounter the following error:

Traceback (most recent call last):
File “/Users/Leon/spinningup/spinup/utils/run_entrypoint.py”, line 10, in
thunk = pickle.loads(zlib.decompress(base64.b64decode(args.encoded_thunk)))
File “/Users/Leon/anaconda/lib/python3.6/site-packages/cloudpickle/cloudpickle.py”, line 800, in _make_skel_func
closure = _reconstruct_closure(closures) if closures else None
File “/Users/Leon/anaconda/lib/python3.6/site-packages/cloudpickle/cloudpickle.py”, line 792, in _reconstruct_closure
return tuple([_make_cell(v) for v in values])
TypeError: ‘int’ object is not iterable

What could be causing this problem?

[Alex_Thunder]

definitely sounds like a cloudpickle problem dude. had similar stuff on python 3.6. try going back to cloudpickle 1.2.2 or maybe even update python, cause that pickle module is kinda finicky with closures.

[elizabeths]

This happens when Spinning Up’s Python dependencies don’t play nice together. The cloudpickle serialization breaks during multiprocessing setup for parallel training. I ran into the same thing - had conflicting gym and mujoco-py versions with an old numpy install. Create a fresh conda environment with Python 3.7 and reinstall Spinning Up from scratch. Also make sure you’ve got the right MuJoCo binaries since Walker2d-v2 needs them. That base64 decoding error means the pickled function got corrupted between processes.