Restyle Update osm_data_cleaning.py

[restyled-io]

A duplicate of #157 with additional commits that automatically address
incorrect style, created by Restyled.

⚠️ Even though this PR is not a Fork, it contains outside contributions.
Please review accordingly.

Since the original Pull Request was opened as a fork in a contributor's
repository, we are unable to create a Pull Request branching from it with only
the style fixes.

The following Restylers made fixes:

• autopep8
• black
• isort
• reorder-python-imports
• yapf

To incorporate these changes, you can either:

1. Merge this Pull Request instead of the original, or

2. Ask your contributor to locally incorporate these commits and push them to
   the original Pull Request

   Expand for example instructions

   ```console
   git remote add upstream https://github.com/pypsa-meets-africa/pypsa-africa.git
   git fetch upstream pull/<this PR number>/head
   git merge --ff-only FETCH_HEAD
   git push
   ```
   

NOTE: As work continues on the original Pull Request, this process will
re-run and update (force-push) this Pull Request with updated style fixes as
necessary. If the style is fixed manually at any point (i.e. this process finds
no fixes to make), this Pull Request will be closed automatically.

Sorry if this was unexpected. To disable it, see our documentation.

[pz-max]

closes #153

[pz-max]

@oayana well done! Welcome to the contributor list. You made it 👍
@davide-f just FYI. The code could potentially lead to some issues in future but is a nice quick solution.

[davide-f]

@pz-max in my computer this version breaks. I add few comments; if you run snakemake -j1 clean_osm_data --force some problem rise:

• line 344 sub.notnull().all() -> sub.notnull().all().all() [easy fix]
• the logic of function split_cells_multiple does not account cases where cables has the ";" but voltage does not
• the fix is not flexible to account for >2 cables, yet that shouldn't be difficult to fix

Did the code work on yours?

[davide-f]

a9a2d8f solves the first two problems mentioned above

[pz-max]

Hi @davide-f, I didn't check th full workflow just the code. I will now work on the CI to have a check running for the whole workflow. That stuff gets a serious problem now 💯