python输入和f定义字符串

go = 1

while go:
    name = input("请输入您的姓名：")
    sex = input("请输入您的性别：")
    age = input("请输入您的年龄：")
    print('您的信息如下：')
    print(f"姓名：{name}")
    print(f"性别：{sex}")
    print(f"年龄：{age}")
    index = input("是否继续？请输入yes或者no：")
    if index == 'yes':
        go = 1
    else:
        if index == 'no':
            print("程序运行结束!")
            go = 0
        else:
            index2 = input("输入错误，请重新输入yes或者no：")
            while index2:
                if index2 == 'yes':
                    go = 1
                    break
                else:
                    if index2 == 'no':
                        go = 0
                        break
                    else:
                        index2 = input("输入错误，请重新输入yes或者no：")