I recently starting learning Python and Im a stocks and crypto invester with my Medium earnings so I enjoyed this. Although I am still starting.
As far as signals are concerned, I don't think proper traders settle for signals made for someone else, but I never thought of using Python for it - I mostly thought about using it for simple stuff like visual novels I could sell to make a buckaroo or two to add to Medium income and grow my portfolios.
I don't think I'll ever be on this level and the coding practice I do from time to time feels like small robbing sessions from stackoverflow. I copy so much code from that my projects are kinda "posing" :/