 <p>Something like this? </p> <pre><code>class ParentFoo(object): def __init__(self,a,b,c=None): print(c) class ChildFoo(ParentFoo): def __init__(self,d,e,f=None): super(ChildFoo,self).__init__(d,e,c="fing") c = ChildFoo("1","2") </code></pre> <p>Official python doc here <a href="https://docs.python.org/2/library/functions.html#super" rel="nofollow">https://docs.python.org/2/library/functions.html#super</a></p>