Test MyPy

test_mypy.py

class Test1:
    def create(self, a:int, b:str) -> None:
      print("hello")

class Test2:
    def create(self):
      """ No error or warning generated even if first argument is a string here"""
      a = "abc"  # should've complained here!
      b = "def"
      Test1().create(a, b)

if __name__ == "__main__":

    a = 5  #  works correcty
    """ If a is changed to "abc", it complains CORRECTLY:
       Argument 1 to "create" of "Test1" has incompatible type "str"; expected "int"
    """
    
    b = "def"
    Test1().create(a,b)
    Test2().create()