Do I have to create and use objects when I use Python classes?

class main:
    def __init__(self,a,b):
        self.a = a
        self.b = b

    def one(self,c):
        self.c = c
        print(self.a, self.b, self.c)
        return self.a + self.b + self.c

    def two(self):
        print(self.a, self.b)b)
        return self.a + self.b

add = main(1,2)
print(add.one(3))
print(add.two())
print("---------------")
print(main(1,2).one(3))
print(main(3,4).two())