What can `__init__` do that `__new__` cannot?

Question

In Python, __new__ is used to initialize immutable types and __init__ typically initializes mutable types. If __init__ were removed f

Answer 1

Everything you can do in __init__ can also be done in __new__.

Then, why use __init__?
Because you don't have to store instance in variable (obj in your example code), and later bother returning it. You can focus on what you realy want to do – initializing mutable object.