shift+enter 运行程序 Tab 代码补全 shift+Tab 查看函数说明 shift+Tab+Tab 查看函数详细说明
https://www.dataquest.io/blog/jupyter-notebook-tips-tricks-shortcuts/
https://blog.csdn.net/gx19862005/article/details/60141711/
https://blog.csdn.net/HeatDeath/article/details/78030902