As you may know, Black is an opinionated code formatter. By using it,
all contributions will use a single consistent code formatting style.
Let the tools and CI do the mundane formatting work so contributions and
reviewers don't have to. Using an automatic code formatting can also
reduce review friction as there are fewer personal choices to discuss.

Black is frequently used by many projects in the Python community. So
using it will also make the distro code look more like other Python
code.

For additional details on Black, see:
https://github.com/psf/black