What is Tk?
Tk is a cross-platform, open source widget toolkit which offers a library basic elements used for building graphical user interface (GUI) in different programming languages. It also provides a number of widgets necessary to develop desktop application including text, menu, button, label, canvas, frame, and do on. This software is designed to run compatibly with Microsoft Windows, Mac OS, Linux, and UNIX.
Tk possesses several characteristics which include being configurable, platform-independent, and customizable. For configuration, there are many options which can be stored in an option database. This makes the look of an application easy to parameterize. In other words, storing the option specific to the application means saving the option adds a command which is executable in loading the application. Meanwhile, the customization of options can be done during the creation of widget or after with the use of the configuration command. Furthermore, Tk is platform-independent since it has been ported to multiple platforms at the same time it can be run without modification.
Overall, Tk provides widgets such as checkbutton, combobocx, entry, labelframe, listbox, menu, menubutton, message, notebook, panedwindow, progress bar, scale, scrollbar, sizegrip, separator, radiobutton, and many others