Tkinter

Tkinter claims to be "most portable GUI toolkit for Python" and is Python's "de-facto standard GUI (Graphical User Interface) package". Although there are several other graphical toolkits for Python, Tkinter is the one most often used.

Installation
On Gentoo, getting Tkinter can be accomplished by directly emerging the package and/or by modifying your system's use flags. Since Tkinter is build on tcl, both of which are closely related to Python, you can get the package by updating your system's global use flags and re-emerging Python. Using this method of installation will pull the packages needed to successfully run Tkinter.

First, modify your make.conf:

Next, re-emerge Python using this command:

That's it! You've installed Tkinter!