Problems

Encapsulation.py

# If objects share object then it breaks Encapsulation

# A -> C
# B -> C
# A and B are sharing C state, breaking the encapsulation of parent Objects (A, B).
# Marionettes problem - https://youtu.be/VSdnJDO-xdg?t=1953

class Animal:
    def __init__(self, name):
        self.name = name
        
class Person:
    def __init__(self, name, pet):
        self.name = name
        self.pet = pet

fluffy = Animal("fluffy")
alice = Person("Alice", fluffy)
bob = Person("Bob", fluffy)

alice.pet.name = "Charlie"
print(bob.pet.name) # Returns "Charlie" even though it was "Fluffy" when bob was assigned pet.