FTA: It is available first today in the July release of the Python Extension for Visual Studio Code, and we will later release it as a standalone component that you can use with any tool that works with the Language Server Protocol.
That's the idea behind the Language Server Protocol, and it seems they will later based on a sibling comment. I love that Microsoft helped to pioneer LSP (not Lumpy Space Princess) because there's too much of a duplicated effort done for other editors. I hope in the future they can team up with JetBrains and make the protocol even more awesome.
JetBeains wasn't very interested in this in the past, mostly because it duplicates effort they've already invested and their solution seems to be better. For now.
The build instructions give a dll and json files, not sure how to use that.