Install and run Mypy

• Install Mypy.
  • Install directly.

      $ pip install mypy
    

  • Or install from requirements (make sure to add mypy to your file first).

      $ pip install -r requirements-dev.txt
    

• Run Mypy.
  • All.

      $ mypy .
      Success: no issues found in 4 source files
    

  • Targeted

      $ mypy my_app tests
      Success: no issues found in 4 source files