Arithmetic Operations in Python using tkinter GUI

Tkinter is the standard GUI library for Python. Python when combined with Tkinter provides a fast and easy way to create GUI applications. Tkinter provides a powerful object-oriented interface to the Tk GUI toolkit.

Note: tkinter vs Tkinter

Some features of Tkinter do not exist in tkinter and vice versa.The main difference is that Tkinter is a module in Python 2x while tkinter is a module in Python 3x.

• The foundational element of a Tkinter GUI is the window. Windows are the containers in which all other GUI elements live. These other GUI elements, such as text boxes, labels, and buttons, are known as widgets. Widgets are contained inside of windows.
• tkinter framework is cross platform so that same code works on windows, mac and linux operating system.
• Import tkinter

import tkinter

Or, more often:

from tkinter import *

• Set up application object by calling TK( ) function.
• This will create a window with title bar, control box with minimize, Maximize and close buttons and a client are to store the widgets
• The geometry( ) method is used to define height, width and coordinates of the frame.
• The application object enters into event listening loop by calling mainloop().
• Buttons are created using button class.

Sample program to create a button with text add

Output:

Output for sample button program

• Entry widget is a single line text box that accepts data from the user.

Sample program on entry widget

Ouput:

Output for sample program widget

• Label can be created using label class

Sample program to create label

Ouput:

Output for label sample program

• place() method in Tkinter

The place geometry manager organizes widgets by placing them in a specific position in the parent widget. Consider the below example code with different values of x and y.

Example1:

Example 1

Output:

Example 2:

Output:

Example 3:

Output:

• The application window has two text input fields and another one to display the result. There are four button objects with the captions Add, Subtract, Multiplication and Division. The user is expected to enter the number in the two Entry widgets. Their respective operation is displayed in the third.
• The first button (Add) is configured using the command parameter. Its value is the add() method in the class. The remaining buttons uses the bind() method to register the left button click with the sub() mul() div()methods. All the methods read the contents of the text fields by the get() method of the Entry widget, parse to numbers, perform the respective operation and display the result in third text field using the insert() method.

Output:

Download the project from the below mention link.

vijayakumarchinthala/Arthematic-operation-in-python-using-tkinter