Python: __add__ and +, different behavior with float and integer

Question

When adding an integer value to a float value, I realized that __add__ method is working fine if called on float, such as this:

>>> n =         


        

Answer 1

a + b does not directly translate to a.__add__(b). It also tries b.__radd__(a) if a.__add__ doesn't exist or returns NotImplemented, or if b is an instance of a subtype of a's type.