[BUG] ModuleNotFoundError for ipython_genutils

[AlpAribal]

Describe the bug
After the recent ipython version bump, our flake8-nb precommit hooks started failing with the error: ModuleNotFoundError: No module named 'ipython_genutils'.

To Reproduce
Steps to reproduce the behavior:

conda create -n test python=3.8
conda activate test
pip install flake8-nb
python
>>> import flake8_nb

Expected behavior
flake8_nb should be imported without any errors.

Screenshots
N/A

Desktop (please complete the following information):

• OS: Ubuntu
• Version 20.04

Additional context
This might be due to ipykernel not stating its dependencies properly, see here.

[s-weigand]

Thanks for reporting this error!
I can reproduce it.
It seems to be an issue with nbconvert which uses ipython_genutils directly without declaring it in their dependencies, but a hotfix is already on its way.
This bug is atm only 16h old and most likely won't get 24h old, so I would say just wait a bit.
Having indirect dependencies which piggybacked in with a dependency of a dependency is a quite common problem with python packages, so huge props for the nbconvert maintainers for their quick reaction.

If you urgently need to keep on working you can just add ipython_genutils as an additional dependency as a quick fix in your .pre-commit-config.yaml

- repo: https://github.com/s-weigand/flake8-nb
  rev: 0.4.0
  hooks:
  - id: flake8-nb
    additional_dependencies: [ipython_genutils]

Since this is an upstream problem that will soon be fixed I will close the issue.

[s-weigand]

@all-contributors please add @AlpAribal for bug

[allcontributors]

@s-weigand

I've put up a pull request to add @AlpAribal! 🎉

[s-weigand]

@AlpAribal nbconvert made a new release and the issue is fixed (see update PR with passing CI).
If pre-commit uses the cached version of the broken env you can just do a pre-commit clean to remove all cached envs.

[AlpAribal]

Thank you for the update, that was fast!