设计一个学生类&班级类

第一题

• 设计一个学生类
  • 属性：姓名、学号、年龄、成绩
• 设计一个班级类要求：实现向班级中添加学生、删除学生、查看学生、按照指定条件排序
  • 属性：班级代号，所有学生
• 需要使用
• calss, __int__, __str__, sort, append, dict, list, remove, for in

class stu:
    # 设置学生基础属性
    def __init__(self, name, num, age, cj):
        self.name = name
        self.num = num
        self.age = age
        self.cj = cj

    def __str__(self):
        return '姓名:{},学号:{},年龄:{},成绩{}'.format(self.name, self.num, self.age, self.cj)


# 查看学生类是否创建成功
# c = stu('小米', 100, 18, 66)
# print(c)

class class1:
    def __init__(self, name):
        self.name = name
        self.class_dict = {}
        self.class_list = []

    def add_stu(self, stu):
        # 添加学生至对应字典列表
        self.class_dict[stu.num] = stu
        self.class_list.append(stu)

    def del_stu(self, num):
        # 弹出后删除
        stu_danchu = self.class_dict.pop(num)
        self.class_list.remove(stu_danchu)

    def sort_stu(self, key, reverse=false):
        # 排序
        self.class_list.sort(key=key, reverse=reverse)

    def show_class(self):
        # 打印
        print(self.name)
        for i in self.class_list:
            print(i)

    def chazhao_stu(self, num):
        return print(self.class_dict.get(num))


# 测试代码

import random

c1 = class1('python')

for i in range(10):
    name = 'stu' + str(i)
    num = 100 + i
    age = random.randint(18, 25)
    cj = random.randint(70, 100)
    c = stu(name, num, age, cj)
    c1.add_stu(c)

# 展示
c1.show_class()
# 排序
c1.sort_stu(key=lambda s: s.num, reverse=true)
# 查找
c1.chazhao_stu(108)
# 删除
c1.del_stu(109)
c1.show_class()