Why use __init__?

Question

Python

Why use __init__ when you can just set variables in the class ?

class A():
    var = 3
    def __init__(self, var2):
        self.var2 = var2

class B(A):
        def x(self):
            print(self.var)
            print(self.var2)


b = B(1)
print(b.x())

Answer 1

Variables in the class when creating an object will have the same value, and when initialized through a constructor, you can pass different values.