import re
import os

info = []


def a():
    print("请选择如下功能：")
    print("1：添加学员：")
    print("2：删除学员")
    print("3：修改学员信息")
    print("4：查询学员信息")
    print("5：显示所有学员信息")
    print("6：保存学员信息")
    print("7：退出系统")


def b():
    new_name = input("请输入您的姓名：")
    new_sex = input("请输入您的性别：")
    new_num = input("请输入您的电话：")
    global info
    for i in info:
        if new_name == i['name']:
            print('用户已存在')
            return
    info_dict = {'name': new_name, 'sex': new_sex, 'num': new_num}
    info.append(info_dict)
    print("{},{},{}".format(new_name, new_sex, new_num))

def c():
    del_name = input('请输入要删除的学员的姓名：')
    global info
    for i in info:
        if del_name == i['name']:
            info.remove(i)
            break
    else:
        print('该学员不存在')
    print(info)


def d():
    modify_name = input('请输入要修改的学员的姓名：')
    global info
    for i in info:
        if modify_name == i['name']:
            i['name'] = input('请输入新的姓名')
            i['sex'] = input('请输入性别')
            i['num'] = input('请输入新的手机号：')
            break
    else:
        print('该学员不存在')
    print(info)

while True:
    a()
    user_num = int(input('请输入您需要的功能序号：'))
    if user_num == 1:
        b()
    elif user_num==3:
        c()
    elif user_num==4:
        d()
    else:
        print("输入功能序号有误")
        continue