Evaluate the Mathematical Expressions using Tkinter in Python

This article focuses on the evaluation of mathematical expression using the Tkinter and math packages in Python. 

Tkinter: Python Tkinter is a GUI programming package or built-in package. Tkinter provides the Tk GUI toolkit with a potent object-oriented interface. Python with Tkinter is the fastest and easiest way to create GUI applications. Creating a GUI using Tkinter is an easy task. 

Math module: In python, a variety of mathematical operations can be carried out with ease by importing a python module called “math” that specifies various functions, making our tasks simpler. 

Steps involved in conversion of temperature:

• Importing the  tkinter & math packages.
• Create the main window.
• Add number of widgets to the main window : Entry , Label.
• Evaluating the expression.
• Displaying message.
• Apply the event trigger on the widgets.

PYTHON

# Importing tkinter module as tk
import tkinter as tk

# Importing all functions/methods
# from math module
from math import *

# Import messagebox class from tkinter
from tkinter import messagebox

# function for evaluating the expression
def eval_expression(event):
    result.configure(text = " Result: " +
                     str(eval(entry.get())))

    messagebox.showinfo("Evaluate Expression",
                        "Successfully evaluated" )


# creating Tk window
root = tk.Tk()

# set geometry of root window
root.geometry('300x150+600+200')

# set the title of root window
root.title('Evaluate Expression')

# label and entry field
input_label = tk.Label(root,
                      text = " Enter Your Expression:",).grid(row = 1)
entry = tk.Entry(root)

# bind 'enter' event to the
# eval_expression() through
# entry widget
entry.bind("

OUTPUT :

Evaluate expression GUI

Evaluate expression working

Below is a video that demonstrates the execution of the code in PyCharm: