How to return a value from __init__ in Python?

I have a class with an __init__ function.

How can I return an integer value from this function when an object is created?

I wrote a program, where __init__ does command line parsing and I need to have some value set. Is it OK set it in global variable and use it in other member functions? If so how to do that? So far, I declared a variable outside class. and setting it one function doesn't reflect in other function ??