一个简单的学生管理系统

import copy
student1 = {'姓名': 0, '年龄': 0, '电话': 0, '学号': 0}
ID1 = 1808000
class1 = []
index = len(class1)

while True:
    print('1.添加学生')
    print('2.查看学生')
    print('3.修改学生信息')
    print('4.删除学生')
    print('5.返回')
    num1 = int(input('请选择（1-5）'))
    if num1 == 5:
        print('1.添加学生')
        print('2.查看学生')
        print('3.修改学生信息')
        print('4.删除学生')
        print('5.返回')
        continue
    if num1 == 1:
        while True:
            name = input('请输入学生姓名')
            age = int(input('请输入学生年龄'))
            tel = int(input('请输入学生电话'))
            ID1 += 1
            str1 = str(ID1)
            student1['姓名'] = name
            student1['年龄'] = age
            student1['电话'] = tel
            student1['学号'] = ID1
            student2 = copy.deepcopy(student1)
            class1.insert(index, student2)
            print('添加成功')
            choice_1 = int(input('1.继续\n2.返回'))
            if choice_1 == 2:
                break
    elif num1 == 2:
        while True:
            print('1.查看所有学生')
            print('2.按姓名查找')
            print('3.按学号查找')
            print('4.返回')
            choice_2 = int(input('请选择（1-4）'))
            if choice_2 == 1:
                for items in class1:
                    print(items)
            elif choice_2 == 2:
                name2 = input('请输入姓名')
                for student1 in class1:
                    if student1.get('姓名') == name2:
                        print(student1)
                        continue
            elif choice_2 == 3:
                ID2 = int(input('请输入学号'))
                for student1 in class1:
                    if student1.get('学号') == ID2:
                        print(student1)
                        continue
            else:
                break
    elif num1 == 3:
        for student1 in class1:
            print(student1)
            name3 = input('请输入需要修改学生姓名')
            if student1.get('姓名') == name3:
                key1 = input('请输入需要修改的项目')
                value1 = input('修改为')
                student1[key1] = value1
                print(student1)
                break
    elif num1 ==4:
        name4 = input('请输入需要删除的学生姓名')
        for student1 in class1:
            if student1.get('姓名') == name4:
                class1.remove(student1)
                break
    else:
        print('错误操作')
        continue