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Wow thanks! Does it just insert these checks automatically (`assert type(my_param) == int`)? I remember being so disappointed when I saw PEP484 and realizing th

• jononor 6y ago
  mypy is only a static checker, there are no runtime-checks inserted. You run it as a command-line tool and it will fail the build if the types do not resolve, like a compiler or linting tool. For runtime-checking based on PEP484 type hints, one can complement this with a library like Pydantic/Enforce.py/typeguard/typesentry. Enforcement of the types is typically opt-in per function call, often by adding a decorator.