* * rename variable * fix type hint * fix doctest * added test function * fixed import error * fixup! Format Python code with psf/black push Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
* pyupgrade --py37-plus **/*.py * fixup! Format Python code with psf/black push
* added sol3.py for problem_20 * added sol4.py for problem_06