# 19.1 Frameworks

Frameworks tend to be harder to document, but are well worth the effort spent.

`Tkinter`
  -- Interface to Tcl/Tk for graphical user interfaces; Fredrik Lundh is working on this one! See An Introduction to Tkinter at http://www.pythonware.com/library.htm for on-line reference material.

`Tkdnd`
  -- Drag-and-drop support for `Tkinter`.

`turtle`
  -- Turtle graphics in a Tk window.

`test`
  -- Regression testing framework. This is used for the Python regression test, but is useful for other Python libraries as well. This is a package rather than a module.