Code initial de l’exercice 2

from typing import *

# MyLittleFacebook
friendships: Dict[str, Set[str]] = {}

def add_friends(name1: str, name2: str) -> None:
    if name1 in friendships:
        friendships[name1].add(name2)
    else:
        friendships[name1] = {name2}
    if name2 in friendships:
        friendships[name2].add(name1)
    else:
        friendships[name2] = {name1}

add_friends("Alex", "Victor")
add_friends("Alex", "Emelyne")
add_friends("Alex", "Emelyne")
add_friends("Emelyne", "Rose")


# Tests pour (b)
# print(friends_of("Emelyne")) # {'Rose', 'Alex'}
# print(friends_of("Rachel"))  # set()

# Tests pour (c)
# print(are_friends("Alex", "Victor")) # True
# print(are_friends("Victor", "Alex")) # True
# print(are_friends("Alex", "Rose"))   # False
# print(are_friends("Alex", "Rachel")) # False
# print(are_friends("Rachel", "Alex")) # False

# Tests pour (d)
# print(f"Consistent before modification? {is_data_consistent()}")  # True
# friendships["Alex"].add("Rachel") # Modification asymétrique
# print(f"Consistent after modification? {is_data_consistent()}")   # False