defget_grade(self):
ifself.score > 100orself.score < 0:
raiseValueError('this score is error.')
ifself.score >= 80:
return'A'
ifself.score >= 60:
return'B'
return'C'
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大爷洒
defget_grade(self):
ifself.score > 100orself.score < 0:
raiseValueError('this score is error.')
ifself.score >= 80:
return'A'
ifself.score >= 60:
return'B'
return'C'