安装前环境说明：
OS：Window 10
已安装：anaconda和jupyter notebook
安装过程：
1、在开始菜单中打开Anaconda Prompt
2、执行jupyter lab安装命令：conda install jupyterlab
3、升级jupyter内核和客户端：conda update jupyter_core jupyter_client
4、启动jupyter lab：jupyter lab
启动jupyter notebook：jupyter notebook
