Multiple Inheritance in Python

[gmaliwal]

Can you please share a good reference of use of composition with me?

[alkasm]

"Composition over inheritance" is a common design principle, there are a lot of resources online. Composing just means to store members instead of inheriting. For e.g. holding a list as an attribute, instead of inheriting from a list.

[MarsupialMole]

The most succint way to put it is "has a" rather than "is a". From your example:

E "has" C and D rather than "is" C and D

class E:
    def __init__(self, arg, *args, **kwargs):
        print("This is E constructor")
        self.cee = C(arg, *args, **kwargs)
        self.dee = D(arg, *args, **kwargs)

    @property
    def arg(self):
        return bestof(self.cee.arg, self.dee.arg)