Скачать или смотреть How to Ensure Your Tkinter Application Closes Properly After Plotting with Matplotlib

Discover how to solve the issue of your Tkinter application not closing completely after plotting with Matplotlib. This guide explains the solution step-by-step.
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How to Ensure Your Tkinter Application Closes Properly After Plotting with Matplotlib

When working with graphical user interfaces (GUIs) in Python, particularly with libraries like Tkinter and Matplotlib, you may encounter a frustrating issue: the program doesn’t exit completely even after closing the application's window. This problem often arises when you're plotting figures, as you may have noticed when running your code.

In this guide, we'll walk through this common issue and provide a clear solution to ensure that your application shuts down properly without leaving any hanging processes. Let’s dive in!

The Problem Explained

When you run a Tkinter application alongside plotting functionality using Matplotlib, you might observe that while the GUI window appears to close, the underlying Python process remains active. This can cause annoyances such as lingering command line windows or unexpected behavior if you try to rerun your code.

Here's a simplified version of the code that illustrates the issue:

[[See Video to Reveal this Text or Code Snippet]]

Upon executing this code, you'll notice that, even after exiting the Tkinter GUI, the terminal or command line might still show that the program is running.

The Solution

To resolve this issue, you need to ensure that Matplotlib properly closes its figure window when the Tkinter window is being closed. The key is to bind a function to the WM_DELETE_WINDOW protocol of the Tkinter window that will handle the cleanup process. Here’s a step-by-step guide on how to implement this solution:

Step 1: Define the Cleanup Function

You first need to create a function that will clean up the Matplotlib figures. This function should close all figures using plt.close('all') and then destroy the Tkinter window.

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Bind the Function to the WM_DELETE_WINDOW Event

Next, you'll bind the on_quit function to the window’s closing event. This way, when the user attempts to close the Tkinter window, your cleanup function will run:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Run the Complete Application

Combine these steps into your existing code, resulting in the following complete application:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

With this modification, your Tkinter application will now terminate properly, and you won’t see any lingering processes in your command line after closing the GUI. This simple addition enhances your program's usability and prevents potential issues when running your code repeatedly.

In summary, remember to always manage your plots efficiently by closing them appropriately when they are no longer needed. This practice will make your applications cleaner and more professional. Happy coding!