Books on graphical user interface (GUI) have an unfair advantage over ordinary computer books. Grayson's very thought out, carefully written in Python and Tkinter Programming in the service of object-oriented GUI double into a very good book and communicate the standards for widget-Tk-based GUI development to the Python community. Short-term outcome will be a rapid expansion in the popularity of Python itself, a long-term outcome will be a new batch of supportable, reusable code. Grayson began with the three variant lines "hello world" who work outside the box. Bonus convenient from the implementation of Python is included in the standard Python release, the current stable version is 1.5. Nearly half of the book is dedicated to the implementation of Tk widgets, and a translation of Tk to Python. Appendix includes issues to build / install Python Tkinter megawidgets and a reference manual consists of nearly 40 percent of the book, leave 15 percent short to medium building tutorials, applications, and performance tuning. While Python for Windows and Macintosh environment is stable, he asserted, did not have the same module Tkinter global look-and-feel controls. Fonts and colors are determined in part by the OS platform. Delicate challenge for developers is to develop a code of good support in the breakneck-boss, GUI-driven environment.