I understand that there are people out there who can work out what's going wrong in their code without that - heck I've done it myself from time to time, back in the dark ages, but it's a hell of a lot faster to go to the point where the data is set and see what it is, and then work through the various points where it's possibly being affected. Adding in logging is such a huge amount of extra effort that is thankfully completely unnecessary with modern tools.
Anyway, that's a good next step. Tomorrow is for experimenting with reading and writing data, and seeing how that all hangs together. And then looking into Python libraries to see what RSS-handling options I have.