"""__author__=Hanlin"""
import json

def p1():
    print('====================================\n')
    print('欢迎来到学生管理系统\n')
    print('====================================\n')
    print('1.登录学生管理系统\n')
    print('2.注册账号密码\n')
    print('3.退出学生管理系统\n')
    print('====================================\n')
    action = input('>>')
    if action == '1':
        return 1
    elif action == '2':
        return 2
    elif action == '3':
        return 3

# =================登录==========================

def login():
    with open('../idPs.json', 'r', encoding='utf-8') as f:
        id = input('请输入你的账号：')
        ps = input('请输入你的密码：')
        content = f.read()
        n_content = json.loads(content)
        for n in n_content:
            if id == n['id']:
                if ps == n['ps']:
                    print('登录成功')
                    break
                else:
                    print('密码错误')
                    break
        else:
            print('请注册账号')


# =============================signup===========================


def signup():
    with open('../idPs.json', 'r', encoding='utf-8') as f:
        content = f.read()
        n_content = json.loads(content)
        new_id = input('请输入你要注册的账号：')
        new_ps = input('请输入你要注册的密码：')
        for n in n_content:
            if n['id'] == new_id:
                print('你输入的账号已被注册')
                break
        else:
            n_content.append({'id': new_id, 'ps': new_ps})
            print('恭喜你，注册成功啦！！！')

    with open('../idPs.json', 'w', encoding='utf-8') as f:
        f.write(json.dumps(n_content))
# =============================main=============================


while True:
    value_1 = p1()
    if value_1 == 3:
        exit()
    elif value_1 == 2:
        value_1_2 = signup()
    elif value_1 == 1:
        value_1_1 = login()
    else:
        print('指令错误')
        continue

json文件

[]