Question Can't train 3DBall (or anything else)

Hi!

I am new to the ML-Agents toolkit. However, the training worked fine yesterday but today when I was going to try to train my own agent, it didn't worked. Yesterday I successfully trained the 3DBall model. However, this doesn't work today as well...

I have tried to reinstall torch and ml-agent with no success.
I installed everything in a virtual environment. I folloed the steps in their installation guide https://github.com/Unity-Technologies/ml-agents/blob/main/docs/Installation.md

Python: 3.9.10
Torch: 1.7.1+cu110

Is there anyone that have an idea of what's going on?

(env) C:\Exjobb\ml-agents\ml-agents-main>mlagents-learn config/ppo/3DBall.yaml --run-id=fi

Traceback (most recent call last):

  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2800.0_x64__qbz5n2kfra8p0\lib\runpy.py", line 197, in _run_module_as_main

    return _run_code(code, main_globals, None,

  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2800.0_x64__qbz5n2kfra8p0\lib\runpy.py", line 87, in _run_code

    exec(code, run_globals)

  File "C:\Exjobb\unity\env\Scripts\mlagents-learn.exe\__main__.py", line 4, in <module>

  File "C:\Exjobb\unity\env\lib\site-packages\mlagents\trainers\learn.py", line 2, in <module>

    from mlagents import torch_utils

  File "C:\Exjobb\unity\env\lib\site-packages\mlagents\torch_utils\__init__.py", line 1, in <module>

    from mlagents.torch_utils.torch import torch as torch  # noqa

  File "C:\Exjobb\unity\env\lib\site-packages\mlagents\torch_utils\torch.py", line 6, in <module>

    from mlagents.trainers.settings import TorchSettings

  File "C:\Exjobb\unity\env\lib\site-packages\mlagents\trainers\settings.py", line 644, in <module>

    class TrainerSettings(ExportableSettings):

  File "C:\Exjobb\unity\env\lib\site-packages\mlagents\trainers\settings.py", line 667, in TrainerSettings

    cattr.register_structure_hook(

  File "C:\Exjobb\unity\env\lib\site-packages\cattr\converters.py", line 207, in register_structure_hook

    self._structure_func.register_cls_list([(cl, func)])

  File "C:\Exjobb\unity\env\lib\site-packages\cattr\dispatch.py", line 55, in register_cls_list

    self._single_dispatch.register(cls, handler)

  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.9_3.9.2800.0_x64__qbz5n2kfra8p0\lib\functools.py", line 855, in register

    raise TypeError(

TypeError: Invalid first argument to `register()`. typing.Dict[mlagents.trainers.settings.RewardSignalType, mlagents.trainers.settings.RewardSignalSettings] is not a class.

 

I installed everything in my Ubuntu WSL, it worked! No idea why it doesn't work in my windows terminal. But no need for help anymore!

 

Bumping this because I'm having this same issue and I can't find any other info about it. Maybe it's a recent bug?

 

I had the same problem. I rolled by virtualenv back to python 3.9.9 and it worked. 3.9.10 came out this week and I must have upgraded to it somehow. 3.9.9 seems to work though.

 

I opened an issue on github:
https://github.com/Unity-Technologies/ml-agents/issues/5689

 

Hey, I ran into the same problem. How exactly do you downgrade the virtual environment?

 

Hi ! Same issue with Python 3.10.4

 

Hello,

it is best to just stick thighly to their instructions:
"
Install Python 3.6.1 or Higher
We recommend installing Python 3.6 or 3.7. If you are using Windows, please install the x86-64 version and not x86. If your Python environment doesn't include pip3, see these instructions on installing it.


Best"