Is it a good programming habit to initialize class attributes while defining a class ?

Question

Does this method have any particular advantages or disadvantages ? In what cases should it be done or avoided ?
In most of the cases I have only seen intialization done for objects using constructors.

Answer 1

I think that you are mixing class attributes and instance attributes that are distinct

class C:
CA= 5

def __init__(self, n):
self.ia= n

CA is a class attribute and ia is a instance attribute.
The first have to be initialized in class context because is class-owned (all instance of that class will refer to CA to the same object) while the latter is initre in ctor because is instance-owned
(any instance of that class will have a different ia object).

I supposed that you referring to python language but tha concept is similar to other oop languages too (with som differences in inizialitation syntax and semantic)