Hi @klyap, I saw the video demos of StreamPy with Flowhub on Youtube, very cool!
I noticed that you're using a NoFlo browser build to provide information about the available components, so that they show up and can be connected in Flowhub. There is actually a way to do that from Python running locally on your machine, without having to make a NoFlo build.
Here is an example: https://github.com/flowbased/protocol-examples/tree/master/python
Here is some docs on how to add the runtime information, and connect to it: http://docs.flowhub.io/getting-started-imgflo/#adding-runtime-for-project-mode-use
This works because Flowhub communicates with the runtime (NoFlo, Msgflo, MicroFlo etc) over the FBP runtime protocol. https://flowbased.github.io/fbp-protocol/