Python – Creating an Onclick Function in Tkinter GUI #python #programming #coding

In this tutorial, we will learn how to create a simple GUI application using Python’s Tkinter library and how to bind a function to a button click event.

Tkinter is a standard GUI library for Python that provides a set of tools for creating desktop applications. It is included with Python and provides an easy way to create interactive applications with buttons, text boxes, labels, and other GUI components.

To get started, you need to have Python and Tkinter installed on your system. Tkinter is included with Python, so you don’t need to install anything extra.

Let’s start by creating a simple GUI application with a button that changes the text of a label when clicked.

from tkinter import *

def onclick():
    label.config(text="Button clicked")

root = Tk()

label = Label(root, text="Hello, World!")
label.pack()

button = Button(root, text="Click me", command=onclick)
button.pack()

root.mainloop()

In this code snippet, we import the necessary modules from Tkinter and define a function onclick that changes the text of the label when called.

We then create a Tkinter root object, which represents the main window of our application. We create a label with the text "Hello, World!" and a button with the text "Click me". We use the command option of the button widget to bind the onclick function to the button click event.

Finally, we start the Tkinter event loop by calling the mainloop method on the root object. This method will keep the application running until the user closes the window.

When you run this code, you will see a window with a label and a button. When you click the button, the text of the label will change to "Button clicked".

You can also pass arguments to the onclick function by using lambda functions. For example, if you want to change the text of the label to a specific message when the button is clicked, you can modify the command option of the button widget like this:

button = Button(root, text="Click me", command=lambda: onclick("Button was clicked"))

And modify the onclick function to accept a parameter:

def onclick(message):
    label.config(text=message)

In this tutorial, we learned how to create a simple GUI application using Python’s Tkinter library and how to bind a function to a button click event. Tkinter provides a powerful set of tools for creating desktop applications, and by following this tutorial, you can start creating your own interactive applications with ease.