class Phone:
# Class attribute: default for all instances
model = ""
class Employee:
first_name = ""
last_name = ""
# No phone yet
personal_phone = None
nokia_phone = Phone()
nokia_phone.model = "Nokia 6610"
iphone18 = Phone()
iphone18.model = "iPhone 18"
kim = Employee()
# Not assigned yet: the class default
print(f"{kim.personal_phone = }")
kim.first_name = "Victoria"
kim.last_name = "Kim"
kim.personal_phone = iphone18
print(f"{kim.personal_phone.model = }")
print(f"{nokia_phone.model = }")