blackdoc is a tool that applies black to code in documentation.

It was originally a rewrite of a gist and called black-doctest. In April 2020, it was renamed to blackdoc.

Dependencies:

• black
• more-itertools

Install it with:

python -m pip install blackdoc

The commandline interface supports two modes: checking and inplace reformatting.

python -m blackdoc --help

In inplace reformatting mode, it will reformat the doctest lines and write them back to disk:

# on explicitly mentioned files
python -m blackdoc file1.py file2.py
# on the whole directory
python -m blackdoc .

When checking, it will report the changed files but will not write them to disk:

python -m blackdoc --check .

It is also possible to use the entrypoint script:

blackdoc --help