#!/usr/bin/env python3

-- coding: utf-8 --

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'
    else:
        return 'C'

bart = Student('Bart Simpson', 59) lisa = Student('Lisa Simpson', 87) bart.print_score() print('成绩等级：%s' % bart.get_grade()) lisa.print_score() print('成绩等级：%s' % lisa.get_grade())