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交个作业

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习题因为内容浅,可以直接看出问题,测试的结果看不懂,错误测试这块一团浆糊,先交个作业,以后回来补这块:

class Student(object):
    def __init__(self, name, score):
        self.name = name
        self.score = score
    def get_grade(self):
        if self.score not in range(101):
            raise ValueError
        elif self.score>=80:
            return 'A'
        elif self.score>=60:
            return 'B'
        else:
            return 'C'

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