@folkerschamel @ado

And yes, many of them are #bugs that would be #agonizing to find by other routes. Your unit test #probably doesn't try passing a #float to that #function you wrote that you only considered using ints with - but with hints, mypy will find that "one weird way" that a float value returned from somewhere else could get passed into the function.

Type hints in code - used well and consistently, no using "#Any" to shut mypy up - make me 50% more productive, I think. </anecdote>