Tkinter python interface the gui toolkit

Tk is a popular and endorsed toolkit developed by John Ousterhout that can handle windows, GUI events, and user interactions. This toolkit is provided as an extension for Tcl. That is why part of Tkinter is an interface to Tcl. Without these routines, the management of a GUI environment would require an application with many lines of code.

The toolkit was originally developed at the University of California, Berkeley, to be a supplement to Tcl (a language also developed by Ousterhout). After his transition to Sun Microsystems, he started a firm called Scriptics (currently known as Ajuba) just to take care of the Tk and Tcl development projects.

Tcl/Tk Documentation

Ajuba