black-nb 0.2.1

Apply black to all code cells in a Jupyter notebook.

black-nb :notebook:

black-nb applies black to Jupyter notebooks.

Much of the code is taken from the original black project and the behaviour is intentionally similar.

Installation

pip install black-nb

Usage

To apply black to all code cells in notebooks under the current directory:

black-nb .

To clear cell outputs in addition to reformatting:

black-nb --clear-output .

To check if notebooks pass black and additionally have no output (files will be unchanged):

black-nb --clear-output --check .

To reformat everything below ./ excluding ./outputs/* and *.ipynb_checkpoints/* :

black-nb --exclude /(outputs|\.ipynb_checkpoints)/ .

Command Line Options

black-nb doesn't provide many options. You can list them by running black-nb --help:

black-nb [OPTIONS] [SRC]...

Options:
  -l, --line-length INTEGER   Where to wrap around.  [default: 88]
                              
  --check                     Don't write the files back, just return the
                              status.  Return code 0 means nothing would
                              change.  Return code 1 means some files would be
                              reformatted.  Return code 123 means there was an
                              internal error.
                              
  --include TEXT              A regular expression that matches files and
                              directories that should be included on
                              recursive searches. On Windows, use forward
                              slashes for directories.  [default: \.ipynb$]
                              
  --exclude TEXT              A regular expression that matches files and
                              directories that should be excluded on
                              recursive searches. On Windows, use forward
                              slashes for directories.  [default:
                              build/|buck-out/|dist/|_build/|\.eggs/|\.git/|
                              \.hg/|\.mypy_cache/|\.nox/|\.tox/|\.venv/|\.ipynb_checkpoints]
                              
  --clear-output              Clearing code output is included in formatting.
  
  --help                      Show this message and exit.

Copyright

Copyright © 2019 Tom Catling.

black-nb is distributed under the terms of the ISC licence.