inheritance.py

class add:
    def __init__(self,a,b):
        self.a = a
        self.b = b
    def add(self):
        print(self.a+self.b)
class sub(add):
    def __init(self):
        super().__init()
        super().__init()
    def sub(self):
        print(self.a-self.b)
        
ope = sub(10,5)
ope.sub()
--------------------------
5

ope.add()
---------------
15