Edit: (after the code change)
There is no way for us to tell you whether you need or not to call your parent's __init__ (or any other function). Inheritance obviously would work without such call. It all depends on the logic of your code: for example, if all your __init__ is done in parent class, you can just skip child-class __init__ altogether.
consider the following example:
>>> class A:
def __init__(self, val):
self.a = val
>>> class B(A):
pass
>>> class C(A):
def __init__(self, val):
A.__init__(self, val)
self.a += val
>>> A(4).a
4
>>> B(5).a
5
>>> C(6).a
12