- https://www.zhihu.com/question/52751876
- https://www.bilibili.com/video/av31440465
- https://www.bilibili.com/video/av33447702
For sql update， need a key is id
how to update database while the table and tree are edited？
哈哈哈哈，半夜笑出声，太兴奋了，早就知道有这种类似的软件，谢谢作者，太兴奋了（但这等于我自己的工作白费？没用？值得吗？协议？ 这个可以做单文件的浏览，文件以pdf储存！） 突然发现关键词因改为 image scanner，但又不想重新搜索？上次树也是一样 https://github.com/openpaperwork 但是还是界面不太好看，只用扫描和整理？
pdf.js can be used here is one of them https://www.pdftron.com/webviewer/demo
Use htmlpy?
WHY I delet files on my computer， then I push it on github it doesn't change？ I'm afraid there are some else problem.
warning: LF will be replaced by CRLF in main.py. The file will have its original line endings in your working directory