print("="*50,"名片管理系统 V1.0","="*50)
print(" "*50,"1.添加一个新名片"," "*50)
print(" "*50,"2.删除一个名片"," "*50)
print(" "*50,"3.修改一个名片"," "*50)
print(" "*50,"4.查询一个名片"," "*50)
print(" "*50,"5.显示所有名片"," "*50)
print(" "*50,"6.退出系统"," "*50)
print("="*119)
card_info = []

while True: #while true是个死循环，当输入的数字错误或者输入的结果结束时，都会跳出“请输入你的选择”
            #继续循环
    num = input("请输入您的选择：")
    if(not num.isdigit()):#判断输入的值是否为数字
        print("输入错误，只能输入1到6")
        continue


    num = int(num)
    if num == 1:#1.添加一个新名片
        new_name = input("请输入名字：")
        new_qq = input("请输入QQ号：")
        new_weixin = input("请输入微信: ")
        new_info = {}#将每个用户的信息防止字典中保存起来
        new_info['name'] = new_name#给字典添加相应的value
        new_info["QQ"] = new_qq
        new_info["weixin"] = new_weixin
        card_info.append(new_info)
        #print(type(card_info))
        #print(card_info)

    elif num == 2: #删除一个名片
        delete = input("请输入要删除的名字：")
        for i in range(len(card_info)):#遍历每个元素的位置
            if delete == card_info[i]['name']:#列表中元素的分片
                card_info.remove(card_info[i])#删除列表中的某个元素
                break
            else:
                print("没用相应的名片信息")



    elif num == 3:#修改名片的信息
        aaa = input("请输入你要修改旧信息的内容(姓名/QQ/weixin)：")
        for i in range(len(card_info)):
            if aaa == card_info[i]['name']:
                bbb = input("请输入修改后的新姓名:")
                card_info[i]['name'] = bbb
            elif aaa == card_info[i]['QQ']:
                bbb = input("请输入修改后新的QQ:")
                card_info[i]['QQ'] = bbb
            elif aaa == card_info[i]['weixin']:
                bbb = input("请输入修改后新的weixin:")
                card_info[i]['weixin'] = bbb
            else:
                print("没有相应的修改内容")

    elif num == 4:#查询名片信息
        find_name = input("请输入要查询的名片的名字：")
        for each in card_info:
            if find_name == each['name']:
                print(each['name'], each['QQ'], each['weixin'])
            else:
                print("没有相应的名片信息")

    elif num == 5:
        if not card_info:
            print("没有名片信息")
            continue
        for g in card_info:
                print(g)


    elif num == 6:  # 退出系统
        break
    else:
            print("输入错误，只能输入1到6")