The widget hierarchy for the hosted app is shown in a listbox, with the selected widget and its parent highlighted.
A visual indication of four key pack arguments (side, anchor, fill, and expand) is displayed below the listbox.
On the right, the actual position of the widget and its parent are shown.
In addition, any wasted space from the geometry manager is highlighted (the dark red colour in the above image).
This is useful for detecting bugs which arise from, for example, mixing side arguments to pack.
The selected widget as well as its parent are highlighted.
Copy the code you wish to visualise into the same directory as tkvis.py (or otherwise give it access to the module).
Replace all references to Tkinter with references to tkvis, eg:
import Tkinter as tk # -> import tkvis as tk
from Tkinter import * # -> from tkvis import *
Configuration settings (including colour choices) are available in config.py.
Only the pack geometry manager is supported.