有关python的题，求解答

num = int(input("请输入学生人生："))
score = {}
for i in range(num):
    xuehao = input("请输入学号：")
    s = input("请输入成绩（以空格分割成绩）：")
    s = [int(i) for i in s.split(' ')]
    score[xuehao] = s
total = {}
for key, value in score.items():
    total[key] = sum(value)
print(total)