How to Fix the AttributeError: 'NoneType' object has no attribute 'save' Error in Pillow

Discover the solution to the `AttributeError` in Pillow when using the `thumbnail()` method in Python. Learn how to properly handle image resizing!
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How to Fix the AttributeError: 'NoneType' object has no attribute 'save' Error in Pillow

If you’re working with images in Python using the Pillow library, you may encounter the frustrating error: AttributeError: 'NoneType' object has no attribute 'save'. This commonly occurs when attempting to save an image after resizing it incorrectly. In this guide, we’ll explain why this error occurs and how to fix it, allowing you to successfully save your images without any issues.

Understanding the Problem

When manipulating images, it's critical to understand how different methods operate. In the example code that caused this error, an attempt was made to create a thumbnail and then save it. Here is the offending section of code:

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

Upon running this code, Python throws the following error message:

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

This error indicates that new_img is None, which causes problems when we attempt to call the save method on it.

The Core Issue: The thumbnail Method

In-Place Modification

Solution Overview

To fix the code, we need to call the save method directly on the original image object, rather than on the new_img variable. Here’s the modified code:

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

Step-by-Step Breakdown of the Fix

Let’s walk through the changes to understand how the solution resolves the issue:

Create Thumbnail: We correctly call the thumbnail() method on the img object. This modifies img in place and resizes the image.

Save the Image: Finally, we save the modified image directly from img, avoiding the variable new_img. This successfully saves the thumbnail image as deTT.png.

Conclusion

If you ever encounter the AttributeError: 'NoneType' object has no attribute 'save' while working with Pillow, remember that some methods, like thumbnail(), modify images in place instead of returning new objects. Understanding how these methods work will not only help you fix issues but also enhance your overall ability to manipulate images in Python. Happy coding!