你的代码缩进有问题

class Student(object):

    def __init__(self, name, score):
        self.name = name
        self.score = score

    def __str__(self):
        return '(%s: %s)' % (self.name, self.score)

    __repr__ = __str__

    #question
    def __cmp__(self, s):
        if self.score < s.score:
            return 1
        elif self.score > s.score:
            return -1
        elif self.score == s.score:
            if self.name < s.name:
                return -1
            elif self.name > s.name:
                return 1
        return 0


L = [Student('Tim', 99), Student('Bob', 88), Student('Alice', 99)]
print sorted(L)