登陆和注册界面.py

# !/usr/bin/env/python
# .*. encoding:utf-8 -*-
import json
key_username = 'username'
key_password = 'password'
log_data={key_username: None, key_password: None}
Landing =False



#登陆
def log_in(username):
    global Landing
    try:
        with open('./'+username+'.json','r',encoding='utf-8') as f:
            content = json.load(f)

        for cont in content:
            if password ==cont['password']:

                Landing = True
            else:
                print('密码错误')
    except:
        print('没有用户信息请注册')



#打印注册
def print_register():
    global username,password
    username = input('请输入你想要注册的用户名:')
    if len(username) <= 0:
        print('用户名不能为空,请重新输入:')
        print_register()

    elif len(username) > 10:
        print('用户名被限制不能用,重新输入:')
        print_register()
    password = input('请输入登陆密码:')


#注册
def register():
    global log_data,all_data

    log_data = {key_username: username, key_password: password}
    try:
        with open('./'+username+'.json','r',encoding='utf-8') as f:
            all_data=json.load(f)
    except FileNotFoundError:
        all_data=[]
    all_data.append(log_data)
    with open('./'+username+'.json','w',encoding='utf-8') as f:
        json.dump(all_data,f)
    print('注册成功,正在返回登陆界面')





#打印
def print_login():
    print('==================')
    print('1.进行登陆')
    print('2.我是第一次我要注册')
    print('3.退出')




#主程序
while True:
    if Landing == True:
        break
    print_login()
    choose =int(input('选择你要进行的操作'))


    if choose == 1:
        username = input('输入用户名:')
        password = input('输入密码')
        log_in(username)


    if choose == 2:
        print_register()
        register()
    if choose == 3:
        print('正在退出...')
        exit()

登陆成功自动跳转到学生管理系统
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学生管理系统界面.py

import 学生管理登陆界面 as st

while True:
    if st.Landing == True:
        print('登陆成功')
        break

    st.print_login()


while True:

    student_data = []


    def printmenu():
        print('——————————欢迎进入千峰学生管理系统——————————')
        print('1.添加学生', end='\n' * 2)
        print('2.查找学生', end='\n' * 2)
        print('3.删除学生', end='\n' * 2)
        print('4.更新学生', end='\n' * 2)
        print('5.退出系统')
        print('6.将所添加的数据保存到本地')
        print('7.把本地文件数据读取出来')
        print('————————————————————————————————', end='\n' * 2)

    #添加学生信息
    def add_stduent():

        student_name = input('请输入学生姓名:')
        student_age = input('请输入学生年龄:')
        student_phone = input('请输入学生电话号码:')
        new_dict = {}
        new_dict['name'] = student_name
        new_dict['age'] = student_age
        new_dict['phone'] = student_phone
        student_data.append(new_dict)
        print('1.继续添加')
        print('2.返回上一层')
        choice = int(input(''))
        if choice == 1:
            add_stduent()

    #查找学生信息
    def look_stduent():
        print('1.查看所有学生的信息')
        print('2.根据序号查看学生信息')
        print('3.返回上一层')
        choice = int(input(''))
        if choice == 1:
            print('学生信息如下')
            print('序号   姓名   年龄  电话号码       ')
            i = 1
            for temp in student_data:
                print('%d      %s    %s   %s'%(i,temp['name'],temp['age'],temp['phone']))
                i += 1

        if choice == 2:
            student_number = int(input('请输入学生序号:'))
            print('序号   姓名   年龄  电话号码       ')

            print('%d      %s    %s   %s' % (student_number, student_data[student_number-1]['name'],
            student_data[student_number-1]['age'], student_data[student_number-1]['phone']))

    #删除学生信息
    def delete_student():
        print('1.删除一个学生信息')
        print('2.删除全部学生信息')
        print('3.返回上一层')
        choice = int(input(''))
        if choice == 1:
            delete_number = int(input('输入你要删除学生的序号:'))
            del student_data[delete_number - 1]
        if choice == 2:
            student_data.clear()


    #更新学生信息
    def update_student():
        print('1.更新学生信息')
        print('2.返回上一层')
        choice = int(input(''))
        if choice == 1:
            student_number = int(input('输入学生的序号:'))
            new_name = input('请输入学生姓名:')
            new_age = input('请输入学生年龄:')
            new_phone = input('请输入学生电话号码:')
            student_data[student_number-1]['name'] = new_name
            student_data[student_number - 1]['age'] = new_age
            student_data[student_number - 1]['phone'] = new_phone

    #保存文件
    def save_data(name=None):
        name = input('你想要保存的文件名')
        print(student_data)
        with open('E:/'+name+'.txt','a',encoding='utf-8') as f:
            f.write(str(student_data))
    #读取文件
    def read_data(name=None):
        try:
            name = input(('你想要读取的文件名'))
            with open('E:/'+name+'.txt','r',encoding='utf-8') as f:
                if f:
                    content = f.read()
                    print(content)
                else:
                    print('本地数据没有内容')
        except FileNotFoundError:
            print('无本地文件,正在创建....')
            with open('E:/'+name+'.txt','w',encoding='utf-8') as f:
                f.write('')

    #退出程序
    def break_game():
        break_game = input('请按回车退出系统:')
        while break_game == '':
            print('程序结束~~')
            exit()

    #主程序
    def main():
        while True:

            printmenu()
            number = int(input('请输入你想要进行的操作:'))
            if number == 1:
                add_stduent()

            if number == 2:
                look_stduent()

            if number == 3:
                delete_student()
            if number == 4:
                update_student()
            if number == 5:
                break_game()

            if number == 6:
                save_data()

            if number == 7:
                read_data()



    if __name__ == '__main__':
        main()