I intent to start learning desktop gui programming, so I've been looking to Python and it's Tkinter, PyGTK and PyGame. But I want to make proprietary software, so I'm concerned because of the licences (PyGTK and PyGame are LGPL, I don't know about Tkinter).
That said my questions are:
If I create a desktop application using Tkinter, PyGTK or PyGame does my app have to be open source?
If it has to be open source, can you suggest me another toolkit - that it's free (as in "no cost") - so that I can create proprietary software?