How to Save a Pillow Image with the Same Name After Editing

Learn how to crop `Pillow` images and save them with the original filename in Python. This guide provides a step-by-step solution to common errors.
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This video is based on the question https://stackoverflow.com/q/68062638/ asked by the user 'aparnadeepak101' ( https://stackoverflow.com/u/4192935/ ) and on the answer https://stackoverflow.com/a/68063073/ provided by the user 'furas' ( https://stackoverflow.com/u/1832058/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Save a Pillow Image with the Same Name After Editing

Have you ever encountered a situation where you need to edit images using the Python Imaging Library (Pillow) and save them with the same filename? If so, you might have faced some challenges when attempting to do this, particularly with error messages that can be confusing. Today, we will explore a common problem and provide a clear solution so you can seamlessly edit and save your images.

The Problem

Let's say you have a collection of images organized in folders, and you want to crop these images while retaining their original names. You might write a script to automate this task, but run into an AttributeError when utilizing the save method from the Pillow library. The code snippet below indicates the problem's origin:

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

The error traceback reveals that PIL.Image.Image objects lack a filename attribute. So, what's the solution?

Understanding the Error

When you open an image file using Image.open(), the returned object has attributes tied to the specific file type. However, after you convert and process that image (e.g., converting to RGB and cropping), the original filename attribute is lost. Therefore, attempting to call im.filename leads to an AttributeError.

Here’s the breakdown of types:

Before Conversion:

type(im) shows <class 'PIL.JpegImagePlugin.JpegImageFile'>

After Conversion:

type(im) changes to <class 'PIL.Image.Image'>, losing the filename property.

The Solution

To save the edited image while retaining the original filename, simply replace im.filename with image_file, which holds the correct path of the file being processed. Here’s how you should modify your code:

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

Summary of Changes

Use image_file for Saving: This keeps the original file name intact and avoids the AttributeError.

Check the Types: Understand the types of objects you are working with; this helps clarify why certain attributes might be unavailable after processing.

Conclusion

Editing and saving images with the same name in Python using the Pillow library is efficient, but you must be aware of the attributes associated with image objects. By changing the code to save images using image_file rather than im.filename, you can avoid errors and streamline your image processing tasks.

Now you can crop your images and save them with confidence that they will retain their original names. Happy coding!

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