I don't know anything about Camelot. Tkinter produces widgets that are in no way as pretty graphically as is expected nowadays -- or indeed for at least 15 years. If this matters to you -- or if you are building for customers if it matters to them, then Tkinter is not a good choice.
Widget libraries are more different than they are similar. So while learning one can give you some very basic ideas about how widgets work, and what a callback is, etc -- it doesn't smooth the learning curve for learning what it is you eventually want to use all that much. If you already know where you are heading for, then I would just start learning that. That said, most of the code I write for me, has, for the longest time used Tkinter. I don't care all that much about the ugliness, and I can write them quite quickly. How much this has to do with Tkinter programs being smaller than similar programs in other systems -- some gui toolkits are _really_ _really_ verbose -- and how much this has to do with the fact that I am familar with Tkinter I do not know. A final concern is where would you like to run these programs when you are done writing them. These days, I want most of the new things I write for me to run on my 7 inch android tablet, and Tkinter doesn't run there. About 6 months ago I started learning kivy and am using this for widgets now -- and converting some of my old programs to use kivy. Kivy works with both Python 2 and Python 3, runs on the desktop as well as in mobile devices, and produces the prettiest widgets you could ask for. It's under active development, and comes with a huge directory of examples showing how to use the various widgets. So if you are still shopping for a widget kit, it is worth a look. Laura -- https://mail.python.org/mailman/listinfo/python-list