csurfer / blackcellmagic Goto Github PK

When formatting cells with magic in it, like

  [...]
  import matplotlib.pyplot as plt
  import seaborn as sns
  import pandas as pd
  %matplotlib inline

the %%black magic returns the error
cannot parse: 12:0 %matplotlib inline

This happens with any line that has a % sign to indicate magic.

Any thoughts on enabling the option to format multiple (all...?) cells at once with %%black?

Thanks for your work on this project. I certainly found it useful. I recently learnt about https://jupyterlab-code-formatter.readthedocs.io/en/latest/index.html and I will likely use that now.

blackcellmagic is incompatible with the latest black version because of the pin in pyproject.toml. Created this PR #15 to relax the dependencies.

Running with 19.3b0 gives the following error:

[blah-blah]python3.6/site-packages/blackcellmagic.py in black(self, line, cell)
     39         if cell:
     40             self.shell.set_next_input(
---> 41                 format_str(src_contents=cell, line_length=line_length),
     42                 replace=True,
     43             )

TypeError: format_str() got an unexpected keyword argument 'line_length'

It seems like this is a result of some changes to how format_str works. I believe line_length is determined by mode now.

Downgrading black by pip install black==18.9b0 fixes this issue.

It seems a little weird to have a new line at the end of the cell. As far as I understand, the purpose for the new line at the end of the file is for versioning, but in jupyder notebooks, the code of each cell is already contained just a single line. Should the default behavior be to not end each cell with a new line?

Thank you for the extension. Do you know -- is there a way that I can set the --line_length=79 by default (so I don't have to write that out each time)?

Thanks again.

Any interest to uploading this to conda-forge?

believe it can be done farily easy with grayskull https://pypi.org/project/grayskull/

Hello!

I would love if

• my cell was automatically formatted on save
• automatically format all cells on save (hopefully this isn't slow, but I guess a dirty flag could be set?)

I'm using VS Code. When I'm working on .py files, VS Code automatically does black formatting (and import sorting!) when I save. I wish I had that in my notebooks in VS Code as well. 🥲

If I have time I may dig into how I add that.

Is it possible to avoid having to type out the magic and execute for every cell?