I've just completed the O'Reilly course on Reactive Python for Data Science, a wonderful course only hampered by the fact that it is based on an outdated API. I'm still coming to grips with the key concepts because it's all so new. I'll list below (for my future self) some helpful resources that I will come back to in due course.
My motivation for wanting to learn reactive programming is apply the ideas of just-in-time from the Toyota Production System to software, especially software used in data science. I was going to write a library to do this before I stumbled up on this. I may write it based on RxPy, the Python API for reactive programming.