How To Create A Popup Message In Python Tkinter

In this tutorial, we will learn how to create a popup message using Python’s Tkinter library. Popup messages are widely used in user interfaces to display useful information or warnings. Hence, knowing how to create one becomes very useful for any application developer.

Step 1: Import the Tkinter library

First, you need to import the Tkinter library. It is included with most Python installations, so there is no need to install it explicitly. Import it using the following line of code:

1
2
import tkinter as tk
from tkinter import messagebox

The messagebox module we imported is a submodule of Tkinter that provides various functions to create and display dialog boxes, including popup messages.

Step 2: Create the main application window

Now, let’s create the main application window. We will be using Tkinter’s Tk class to create the window:

1
2
root = tk.Tk()
root.title('Tkinter Popup Message Example')

The title() function sets a title for the main window. In this case, it is a ‘Tkinter Popup Message Example’.

Step 3: Create a button to trigger the popup message

We will create a button that, when clicked, will display the popup message. To create a button, use the Button class from the Tkinter library:

1
2
3
4
5
def show_popup():
messagebox.showinfo("Popup Message", "Hello Tkinter Popup!")
 
popup_button = tk.Button(root, text="Show Popup", command=show_popup)
popup_button.pack()

The show_popup function is defined and will be triggered when the button is clicked. It displays a popup message using the messagebox.showinfo() function. You can change the title and text of the popup message by modifying the arguments passed to the showinfo() function.

The Button class is used to create a button with the text “Show Popup”. The command parameter is set to show_popup, the function we defined earlier. The pack() function is used to add the button to the main window.

Step 4: Run the application

Finally, let’s run the application:

1
root.mainloop()

The mainloop() function starts the event loop and keeps the window open.

After completing these steps, you should have a working program that creates a popup message using Tkinter.

Full code

1
2
3
4
5
6
7
8
9
10
11
12
13
import tkinter as tk
from tkinter import messagebox
 
def show_popup():
    messagebox.showinfo("Popup Message", "Hello Tkinter Popup!")
 
root = tk.Tk()
root.title('Tkinter Popup Message Example')
 
popup_button = tk.Button(root, text="Show Popup", command=show_popup)
popup_button.pack()
 
root.mainloop()

Output

When you run the program, you will see a window with a button labeled “Show Popup”. Clicking the button will display the popup message with the title “Popup Message” and the text “Hello Tkinter Popup!”.

Click the “Show Popup” button to see the popup message:

Conclusion

In this tutorial, we learned how to create a popup message using Python’s Tkinter library. By following these simple steps, you can incorporate popup messages into your own User Interface applications to display relevant information to your users.