Free Full Course on Python Tkinter 🐍

Python Tkinter is a popular library used for creating GUI applications in Python. In this tutorial, we will cover all the basics of Tkinter and show you how to create a full-fledged GUI application.

Introduction to Tkinter
Tkinter is the standard GUI toolkit for Python. It is included with most Python installations, so you don’t need to install anything extra to get started with it.

To create a new Tkinter application, you must first create an instance of the Tk class. This class represents the main window of a Tkinter application. Here is a simple example:

import tkinter as tk

root = tk.Tk()
root.mainloop()

When you run this code, you will see a blank window created by Tkinter. The mainloop() method starts an event loop that listens for events triggered by the user, such as clicking buttons or typing text.

Widgets
Tkinter provides a variety of widgets that you can use to build your GUI. Some of the most common widgets include buttons, labels, entry fields, and frames. Here is an example of how to create a button in Tkinter:

button = tk.Button(root, text="Click Me")
button.pack()

In this code, we create a new button widget with the text "Click Me" and call the pack() method to add it to the main window.

Layout Management
Tkinter provides several methods for managing the layout of widgets within a window. The pack() method we used above is a simple way to add widgets to a window in a sequential order. You can also use the grid() and place() methods to create more complex layouts.

Event Handling
In Tkinter, you can bind functions to events that are triggered by user actions, such as clicking a button or typing in an entry field. Here is an example of how to bind a function to a button click event:

def on_button_click():
    print("Button clicked")

button = tk.Button(root, text="Click Me", command=on_button_click)
button.pack()

In this code, we define a function called on_button_click() that gets called whenever the button is clicked. We then pass this function to the command parameter of the button widget.

Creating a Full-fledged GUI Application
Now that you are familiar with the basics of Tkinter, let’s create a simple calculator application to demonstrate how to build a full-fledged GUI application. Here is the code for the calculator:

import tkinter as tk

def calculate():
    result.set(eval(entry.get()))

root = tk.Tk()
root.title("Simple Calculator")

entry = tk.Entry(root)
entry.pack()

result = tk.StringVar()

label = tk.Label(root, textvariable=result)
label.pack()

button = tk.Button(root, text="Calculate", command=calculate)
button.pack()

root.mainloop()

In this code, we create an entry field for the user to input an expression, a label to display the result, and a button to trigger the calculation. The calculate() function uses the eval() function to evaluate the expression and update the result label.

Conclusion
This tutorial has covered the basics of Tkinter and shown you how to create a simple GUI application in Python. Tkinter is a powerful tool for building GUIs, and with practice, you can create complex and interactive applications. With this knowledge, you can start building your own GUI projects in Python. Happy coding! 🐍