Running raylab experiment crashes

[danielpalenicek]

• raylab version: 0.14.14
• Python version: 3.7.9
• Operating System: Ubuntu 18.04.5 LTS

When running raylab experiment "PG" --config examples/PG/cartpole_defaults.py I get the following error:

Traceback (most recent call last):
  File "/home/palenicek/miniconda3/envs/raylab_test/bin/raylab", line 8, in <module>
    sys.exit(raylab())
  File "/home/palenicek/miniconda3/envs/raylab_test/lib/python3.7/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/home/palenicek/miniconda3/envs/raylab_test/lib/python3.7/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/home/palenicek/miniconda3/envs/raylab_test/lib/python3.7/site-packages/click/core.py", line 1259, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/palenicek/miniconda3/envs/raylab_test/lib/python3.7/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/palenicek/miniconda3/envs/raylab_test/lib/python3.7/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/home/palenicek/miniconda3/envs/raylab_test/lib/python3.7/site-packages/raylab/cli/utils.py", line 164, in wrapped
    return func(*args, tune_kwargs=tune_kwargs, **kwargs)
  File "/home/palenicek/miniconda3/envs/raylab_test/lib/python3.7/site-packages/raylab/cli/utils.py", line 19, in wrapped
    return func(*args, **kwargs)
  File "/home/palenicek/miniconda3/envs/raylab_test/lib/python3.7/site-packages/click/decorators.py", line 21, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/home/palenicek/miniconda3/envs/raylab_test/lib/python3.7/site-packages/raylab/cli/utils.py", line 51, in wrapped
    process_tune_kwargs(ctx, **tune_kwargs)
  File "/home/palenicek/miniconda3/envs/raylab_test/lib/python3.7/site-packages/raylab/cli/utils.py", line 172, in process_tune_kwargs
    delete_if_necessary(ctx, osp.join(local_dir, name))
  File "/home/palenicek/miniconda3/envs/raylab_test/lib/python3.7/posixpath.py", line 94, in join
    genericpath._check_arg_types('join', a, *p)
  File "/home/palenicek/miniconda3/envs/raylab_test/lib/python3.7/genericpath.py", line 153, in _check_arg_types
    (funcname, s.__class__.__name__)) from None
TypeError: join() argument must be str or bytes, not 'NoneType'

I tried installing ray lab both using pip, as well as from source master and the last stable release version 0.10.0. I always get this error.

I am not sure, what the problem is. From the documentation I am also not 100% sure on how raylab should be used. I tried running the cli commands, as well as the /example files directly. All of which gave me the above error.

Any ideas on how to fix this issue?

[0xangelo]

Hi Daniel and sorry for the late reply.

I believe this error is due to missing the --name parameter in the raylab experiment command (I forgot to set this as a required parameter via click). Moreover, examples/PG/cartpole_defaults.py uses a deprecated rllib config, use_pytorch, which may give an error in newer versions of ray.

I successfully ran the following on a fresh virtual environment after installing raylab==0.14.4, ray==0.8.7, and gym-cartpole-swingup==0.1.0:

raylab experiment PG --config cartpole_defaults.py --name PG

where I substituted "framework": "torch" for "use_pytorch": True.

I'll fix these two issues (the required name parameter and deprecated config key) as soon as possible. Thanks for submitting the issue!

I also apologize for not expanding upon the documentation on how to use raylab. The project is on hold for now as I finish my MSc degree and I'll try to give it a bit of polish after that.