Pipenv install and missing `torch-discounted-cumsum` module

[lucascassiano]

I installed the minRLHF library using pipenv

pipenv run python -m pip install "minrlhf @ git+https://github.com/thomfoster/minRLHF.git"

And got this execution error:

Traceback (most recent call last):packages/minRLHF/ppo_trainer.py", line 7, in <module>
    from minRLHF.buffer import Buffer
  File "{...}/lib/python3.10/site-packages/minRLHF/buffer.py", line 6, in <module>
    from torch_discounted_cumsum import discounted_cumsum_right
ModuleNotFoundError: No module named 'torch_discounted_cumsum'

The solution was to simply install the missing torch-discounted-cumsum module

 pipenv install torch-discounted-cumsumÏ

I'm not sure if that's a pipenv installation issue, or somewhere in the library itself.