学生管理系统（自己版）

import my_functions

my_functions.sgister_sign_interface()

import json
# 注册(sgister)登录(sign)界面
def sgister_sign_interface():
    choose_num = input('欢迎来到学生管理系统\n1.用户登录\n2.用户注册\n3.退出\n请选择：')
    if choose_num == '1':
        return sign_interface()
    elif choose_num == '2':
        return sgister_interface()
    elif choose_num == '3':
        return exit()
    else:
        print('输入有误')
        return  sgister_sign_interface()

# 登录界面函数
def sign_interface():
    with open('./sign_num.json') as f:
        sign_num = json.load(f)
        n = input('请输入账号')
        m = input('请输入密码')
        for x in sign_num:
            if n == x['sign_id']:

                break
        else:
            print('无此账号')
            return sign_interface()
        if m == x['password']:
            print('登陆成功')
            return main_interface()



# 注册新用户界面函数
def sgister_interface():
        n = input('请输入您要注册的账号：')
        m = input('请输入您的密码：')
        with open ('./sign_num.json') as f:
                sign_num = json.load(f)
        sgister_message = {'sign_id':n,'password':m}
        sign_num.append(sgister_message)
        with open('./sign_num.json','w') as f:
            json.dump(sign_num,f)
        k = input('注册成功\n1.直接登录\n2.返回上一级\n3.退出')
        if k == '1':
            return main_interface()
        elif k == '2':
            return sgister_sign_interface()
        elif k == '3':
            return exit()
        else:
            print('输入错误，将返回上级')
            return sgister_sign_interface()




#主登录界面函数
def main_interface():
    input_start = input('欢迎来到学生管理系统\n1.添加学生\n2.查找学生\n3.修改学生\n4.删除学生\nq.退出系统\n请输入序号进行操作：')
    if int(input_start) == 1:
        add_stu()
    elif int(input_start) == 2:
        search_student()
    elif int(input_start) == 3:
        print("333")
    elif int(input_start) == 42:
        print('444')
    elif input_start == 'q':
        print('qqq')

    else:
         print('输入有误')
         return main_interface()


# 添加学生函数
def add_stu():
    student = {'name': input_name, 'stu_id' : input_stu_id,'age': input_age, 'tel': input_tel}
    input_name = input('请输入学生姓名')
    input_stu_id = input("请输入学生学号")
    if input_stu_id in message['stu_id']:
        print('已有此学生！添加失败')
        add_failed = input(':1.重新添加\n2.返回上级\n请输入:')
        if int(add_failed) == '1':
            return add_stu()
        else:
            return main_interface()
    else:
        input_age = input('请输入学生年龄')
        input_tel = input('请输入学生电话')
        message.append(student)
        print('添加成功')
        i += 1
        add_success = input(':1.继续添加\n2.返回上级\nq.退出系统\n请输入:')
        if int(add_success) == '1':
            return add_stu()            #返回添加函数本身
        else:
            return main_interface()     #返回主界面函数


# 查询学生函数
def search_student():
    input_name = input("请输入学生姓名")
    i2 = 0
    for x in message:
        if input_name == x['name']:
            print(message[i2])
            i2 += 1
        else:
            i2 += 1

    print('1.继续查询\n2.返回上级\nq.退出系统')
    search_end = input("请选择操作:")
    if int(search_end) == '1':
        return search_student()
    elif int(search_end) == '1':
        return main_interface()
    elif search_end == 'q':
        exit()
    else:
        print('输入有误')
        return main_interface()


# 删除学生函数
def delete_student():
    input_name = input('请输入学生姓名')
    i2 = 0
    i3 = 0
    del_search_result = []
    for x in message:
        del_search_student = {}
        if input_name == x['name']:
            print(i2,message[i3])
            del_search_student[i2] = message[i3]#设置序号与信息的字典
            del_search_result.append(del_search_student)
            i2 += 1
            i3 += 1
        else:
            i3 += 1

    if len(del_search_result) == 0:
        print('无学生可删除')
        h = input('1.继续删除\n2.返回上级\nq.退出系统\n请选择要执行的操作：')
        del_return_fun(h)
    else:
        index_def_stu = input('请输入要删除的学生序号')
        for y in del_search_result:
            if index_def_stu == y[0]:
                del message[i3]
                print('删除成功')
                k = input('1.继续删除\n2.返回上级\nq.退出系统\n请选择要执行的操作：')
                del_return_fun(k)
            else:
                print('输入有误')
                g = input('1.继续删除\n2.返回上级\nq.退出系统\n请选择要执行的操作：')
                del_return_fun(g)


# 删除学生的返回函数
def del_return_fun(m):

    if m == '1':
        return delete_student()
    elif m == '2':
        return main_interface()
    elif m == 'q':
        return exit()
    else:
        print('输入有误')
        return main_interface()