How to create an instance of another class within a new class at instantiation?

Question

I'm trying to create a class called B which contains an attribute called news (news being an instance of class A taken at instantiation).

class A has been defined earlier.

However, I'm not sure how to write this in code. I have two attempts below, though I'm not sure if either is correct. Can someone provide some insight?

# Attempt 1:    
class B():
    def __init__ (self, news):
        self.news = A()

# Attempt 2:    
class B():

    news = A() # news being an instance of class A

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

Thank you!

Answer 1

Simple:

class B(object):

    def __init__(self):
        self.news = A()

You create an instance of A by calling A() , which you then assign to your instance variable news . So now B.news is an sintance of class A .