Question

def get_average_club_count(person_to_clubs: Dict[str, List[str]]) -> float:
"""Return the average number of clubs that a person in person_to_clubs
belongs to.

>>> get_average_club_count(P2C)
1.6
>>> get_average_club_count({'Bob': ['X', 'Y'], 'John': []})
1.0
"""

This is the function I need to test for edge cases, I need to have a test case such that it will detect that the input has been modified(mutation). What test case would I implement?

Answer 1

def get_average_club_count(person_to_clubs) -> float:
    total = 0
    for x in person_to_clubs.keys():
        total+=len(person_to_clubs[x])
    return total/len(person_to_clubs.keys())

# Testing
print(get_average_club_count({'Bob': ['X', 'Y'], 'John': []}))