* Travis CI: Fix Travis linter errors * fixup! Format Python code with psf/black push * Update .travis.yml * updating DIRECTORY.md Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
* Add Monte Carlo estimation of PI * Add type annotations for Monte Carlo estimation of PI * Compare the PI estimate to PI from the math lib * accuracy -> error * Update pi_monte_carlo_estimation.py Co-authored-by: John Law <johnlaw.po@gmail.com>