解析python字典中相同键的值

Question

alice_ratings = {"alonzo": 1, "bob": 3, "turing" : 2}

bob_ratings = {"alice": 1, "alonzo": 2, "turing": 3}

alonzo_ratings = {"alice": 3, "bob": 2, "turing": 1}

turing_ratings = {"alice": 2, "alonzo": 1, "bob": 3}

给了我相应的学生偏好字典，我想写一个函数，返回一个平均分最低的学生，我该怎么做。示例：alonzo 的总体评分为 4，我该怎么做才能有人帮我解决这个问题

Answer 1

IIUC，用途：def lowest(*args):    ratings = {}    for d in args:        for k, v in d.items():            if k in ratings:                ratings[k] += v            else:                ratings[k] = v    return min(ratings, key=lambda k: ratings[k])或者，from collections import defaultdictdef lowest(*args):    ratings = defaultdict(int)    for d in args:        for k, v in d.items():            ratings[k] += v    return min(ratings, key=lambda k: ratings[k])调用函数：print(lowest(alice_ratings, bob_ratings, alonzo_ratings, turing_ratings))这打印：alonzo