What is Python and ExtJs for a quick start?

Question

ExtJS/Sencha

Requires a user-friendly interface for the internal system on flask. Now flask-admin is used, but it is not enough anymore. I screwed a table from extjs into the admin panel and a problem arose, write my own lib for extjs or find a ready-made one. but the search returned no results. like extjs-direct looks like what you need, but it's not clear how to use tables through it, for example.
Tell me who uses what, where to start.?