Python have a class variable defined as an instance inside another class [closed]

Question

I am looking to have a class variable inside another class. Class A is what I want to have as an instance in class B. Somehow I get an error:

new_B = B("Hello", new_A) TypeError: B() takes no arguments

I have read something about inner classes but don't understand how to apply constructors there.

class A:
    hp_id = ""

    def __init__(self, hp_id):
        self.hp_id = hp_id

class B:
    score = ""
    strand = A()

    def __int__(self, score, strand):
        self.score = score
        self.strand = strand

new_A = A("hello")
new_B = B("Hello", new_A)

print(new_B)

Answer 1

Error is because you misspelled your B's constructor __int__