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, score):         self.name = name         self.num = num         self.age = age         self.score = score     def __str__(self):         return '姓名:{},学号:{},年龄:{},成绩{}'.format(self.name, self.num, self.age, self.score) # 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)     score = random.randint(70, 100)     c = Stu(name, num, age, score)     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()