python 学生管理系统

一、主界面

def home(str1 = '游客'):



    print('★★★★★★★★★★★★★★★★★★★★')
    print('     欢迎%s使用学生管理系统          ' % str1)
    print('+                                  +')
    print('+          1.regist                +')
    print('+                                  +')
    print('+          2.login                 +')
    print('+                                  +')
    print('+          3.quest                 +')
    print('+                                  +')
    print('★★★★★★★★★★★★★★★★★★★★')
    return

if __name__ == '__main__':
    pass

二、

import  json

key_name = 'user_name'
key_pwd = 'user_pwd'
key_stu = 'student_info'

student_info =[]
def user_regist():

    # 账号

    try:
        with open('./user.json', 'r', encoding='utf-8') as k:
            content =  json.load(k)
    except FileNotFoundError:
        content = []

    # 取出文件中的数据,判断用户名是否被注册过
    while True:
        user_name = input('请输入用户名:')
        for index in range(len(content)):
            if content[index][key_name] == user_name:
                print('用户名已经存在')
                return
            else:
                continue
        break

    print('用户名可以使用')
    user_pwd = input('请输入密码:')
    user_pwd1 = input('请再次输入密码:')

    # 判断两次密码是否相同
    if user_pwd != user_pwd1:
        print('两次输入的密码不一样')
        return
    else:
        user = {key_name: user_name, key_pwd: user_pwd, key_stu: student_info}
        content.append(user)
        with open('./user.json', 'w', encoding='utf-8') as k:
            json.dump(content, k)
        return None


if __name__ == '__main__':
    user_regist()

三、

import json

key_name = 'user_name'
key_pwd = 'user_pwd'
key_stu = 'student_info'
stu_key_name = 'stu_name'
stu_key_tel = 'stu_phone'
stu_key_age = 'stu_age'

student_info =[]
userinfo = []

def user_login():


    # 打开文件,判断文件是否存在
    try:
        with open('./user.json', 'r', encoding='utf-8') as k:
            content =  json.load(k)
    except FileNotFoundError:
        print('没有用户')
        content = []

    # 判断用户是否存在
    while True:
        user_name = input('请输入用户名:')
        user_pwd = input('请输入密码:')
        for index in range(0,len(content)):
            if content[index][key_name] == user_name:
                userinfo = content[index]
                break
        else:
            print('用户不存在')
            continue
    # 获得你登录的用户的学生信息
    # for index in range(len(content)):
    #     if content[index][key_name] == user_name and content[index][key_pwd] == user_pwd:
    #         print('登录成功')
    #         break
        if userinfo[key_pwd]  == user_pwd:
            print('登录成功')
            break
        else:
            print('密码错误')
            continue
    student_info = content[index][key_stu]

    # 学生管理功能
    while True:
        print('1、添加学生')
        print('2、删除学生')
        print('3、查看学生')
        print('4、返回上一层')
        n = input('请选择:')
        if '0' < n < '5':

            if n == '1':            # 添加
                stu_name = input('请输入学生姓名:')
                stu_tel = input('请输入学生电话:')
                stu_age = input('请输入学生年龄:')
                student = {stu_key_name: stu_name, stu_key_tel: stu_tel, stu_key_age: stu_age}
                student_info.append(student)
                with open('./user.json', 'w', encoding='utf-8') as u:
                    json.dump(content, u)
                    print('添加成功')

            if n == '2':            # 删除
                m = True
                while m:
                    # 如果没有存入学生
                    if not len(student_info):
                        print('没有学生')
                        break
                    get_name = input('请输入要删除的学生的姓名：')
                    flag = True
                    a = []
                    copy_name = []
                    # 通过名字查找学生
                    for i in range(0, len(student_info)):
                        if get_name == student_info[i][stu_key_name]:
                            a.append(i)
                            copy_name.append(student_info[i])
                    # 如果没有重名，直接删除
                    if len(copy_name) == 1:
                        for i in range(0, len(student_info)):
                            if get_name == student_info[i][stu_key_name]:
                                del student_info[i]
                                break
                        flag = False
                        with open('./user.json', 'w', encoding='utf-8') as u:
                            json.dump(content, u)
                            print('删除成功！')
                    # 如果有重名选择删除的人
                    elif len(copy_name) > 1:
                        for i in range(0, len(copy_name)):
                            print(copy_name[i])

                        del_name = int(input('你想删除第几个？')) - 1
                        del student_info[a[del_name]]
                        flag = False
                        with open('./user.json', 'w', encoding='utf-8') as u:
                            json.dump(content, u)
                        print('删除成功！')


                    if flag:
                        print('该学生不存在')
                    m = int(input('输入1继续删除，输入0返回上级：'))

            if n == '3':        # 查看

                print(student_info)

            if n == '4':
                print('返回上一层')
                return

        else:
            print('你的输入有误!')
            continue

if __name__ == '__main__':
    pass

四、测试