This ttk wrapper provides classes to allow using the Tk themed widget set, as well some extensions, under Python. Ttk is based on a revised and enhanced version of TIP #48 (http://tip.tcl.tk/48) specified style engine. Its basic idea is to separate, to the extent possible, the code implementing a widget's behavior from the code implementing its appearance. Widget class bindings are primarily responsible for maintaining the widget state and invoking callbacks, all aspects of the widgets appearance lies at Themes.