Tkinter is Python's de-facto standard GUI (Graphical User Interface) package. It is a thin object-oriented layer on top of Tcl/[http://wiki.tcl.tk/tk Tk].
Tkinter is not the only GuiProgramming toolkit for Python. It is however the most commonly used one, and almost the only one that is portable between Unix, Mac and Windows. CameronLaird calls the yearly decision to keep TkInter "one of the minor traditions of the Python world."
The Tkinter wiki: http://tkinter.unpythonic.net/wiki/
[http://www.astro.washington.edu/owen/TkinterSummary.html Tkinter Summary]
[http://www.astro.washington.edu/owen/ROTKFolklore.html Tkinter Folklore]
David McNab recommended the latter two as particularly "pythonic" in not insisting that readers think in Tcl.
[http://www.ferg.org/thinking_in_tkinter/index.html Thinking in Tkinter] is an introduction to some basic Tkinter programming concepts.
[http://www.tcl-tk.net/man/ Online Tcl/Tk Manual Pages] - the official man pages at the Tcl Developer Xchange.
The New Mexico Institute of Mining and Technology created its own Tkinter manual. It is available in [http://www.nmt.edu/tcc/help/pubs/tkinter/ HTML] and [http://www.nmt.edu/tcc/help/pubs/tkinter.pdf PDF].
The Tkinter Life Preserver, by Matt Conway is still useful, though way out of date. It's the only document that explains how to read the Tcl/Tk manuals and translate the information there to Tkinter calls. [http:/doc/life-preserver/index.html HTML version], converted by Ken Manheimer.
- The source: when all else fails: Read The Source, Luke!
Demo/tkinter/ in the Python source distribution.
- This contains many helpful examples, including updated versions of Matt Conway's examples.
Lib/lib-tk/Tkinter.py in any Python distribution.
- Other prominent Tcl/Tk sites:
- ["How Tkinter can exploit Tcl/Tk extensions"]