class Student(object): def init(self, name, score): self.name = name self.score = score

def print_score(self):
    print('%s:%s' % (self.name, self.score))

def get_grade(self):
    if self.score >= 90:
        return 'A'
    elif self.score >60:
        return 'B'
    elif self.score < 60:
        return 'C'

bart = Student('LiuHua', 98) print(bart.name, bart.get_grade())