The application executes appropriate callback functions in response to a particular type of event. The event could be text entered in a text field, selection made from drop down or radio button, single/double click actions of mouse etc. The application object then enters an event listening loop by calling its mainloop() method.The application is now constantly waiting for any event generated on elements in it. can be placed on this top level window.import tkinter top=tkinter.Tk() top.mainloop()The top level window represented by this application object is having a frame with title bar, control box with maximize, minimize and close buttons, and inner client area to hold other widgets. Other widgets such as Label, Button, Entry etc. They are listed below:tkinter.scrolledtextText widget with a vertical scroll bar built in.lorchooserDialog to let the user choose a class for the dialogs defined in the other modules listed dialogs to allow the user to specify a file to open or to help work with to standard Tk dialog dialogs and convenience -and-drop support for access to the Tk themed widget setPython's Tkinter module contains Tk class. Tkinter is actually a package consisting of many modules. Other installable GUI toolkit modules are:PyQt is the Python interface to Qt, a very popular cross-platform GUI framework.PyGTK module ports Python to another popular GUI widget toolkit called GTK.WxPython is a Python wrapper around WxWidgets, another cross-platform graphics library.We shall learn use of Tkinter in developing GUI based Python programs. This module is bundled with standard distributions of python for all platforms, and hence it need not be installed. Tkinter has been developed by Fredrik Lundh. It is ported to Python in the form of TKinter module. Functions in the program are called depending upon the event generated by user's action such as clicking a button, selecting an item, or a mouse action.The Tk toolkit from Tcl is a cross platform and open source GUI toolkit. In contrast, the GUI based program runs in an infinite event loop. Many such libraries have been made available to Python in the form of importable modules.When a computer program that is executed in text based console mode, it follows a sequential path by default. A graphics library is an application programming interface (API) that defines functionality of various GUI elements. called GUI widgets.Various graphics libraries are available for use with programming languages. He can select from alternatives with the help of radio buttons, dropdowns etc. Today user can interact with computer application through mouse clicks. The older operating systems like MSDOS had a command line interface and user is only able to interact with it in the form of text input.
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This makes it possible for different versions of Windows OS, and desktop distributions of Linux to provide a user friendly graphical interface to the user. Python Tutorial By KnowledgeHut Modern computing devices are equipped with powerful processors and advanced graphics hardware.