python __init__ method in inherited class

Question

I would like to give a daughter class some extra attributes without having to explicitly call a new method. So is there a way of giving the inherited class an __init__

Answer 1

Just call the parent's __init__ using super:

class inheritedclass(initialclass):
    def __new__(self):
        self.attr3 = 'three'
        super(initialclass, self).__init__()

I strongly advise to follow Python's naming conventions and start a class with a Capital letter, e.g. InheritedClass and InitialClass. This helps quickly distinguish classes from methods and variables.