https://drill.apache.org/ 一 简介 Drill is an Apache open-source SQL query engine for Big Data exploration. Drill is designed from the ground up to support high-performance analysis on the semi-structured and rapidly evolving data coming from modern Big
1.当输入exit命令是退出程序,如果输入其他的就打印====> 方法一while True: username=input("请输入你的用户名:>>>") password=input("请输入你的密码:>>>") if username=='zhanghaiyan' and password=='123456': print('login successful') while True: cmd=input("