Skip to content
Related Articles

Related Articles

Evaluate the Mathematical Expressions using Tkinter in Python

Improve Article
Save Article
  • Last Updated : 17 Feb, 2022
Improve Article
Save Article

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.


# 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: " +
    messagebox.showinfo("Evaluate Expression",
                        "Successfully evaluated" )
# creating Tk window
root = tk.Tk()
# set geometry of root window
# 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


Evaluate expression gui

Evaluate expression GUI

Evaluate expression working

Evaluate expression working


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

My Personal Notes arrow_drop_up
Related Articles

Start Your Coding Journey Now!