Fixing "AttributeError: module 'PIL.Image' has no attribute 'ANTIALIAS'"

If you're encountering the error AttributeError: module 'PIL.Image' has no attribute 'ANTIALIAS', don't worry - this is a common issue that's easy to fix. Here's what's happening and how to resolve it.

Why This Error Occurs

This error typically appears in one of two scenarios:

1. Pillow version 10.0.0 or higher: The ANTIALIAS constant was deprecated and then removed in favor of Resampling.LANCZOS.

2. Incorrect import: You might be importing PIL.Image incorrectly.

The Solution

For Pillow 10.0.0+ (Recommended)

from PIL import Image

# Replace this:

# image = image.resize((width, height), Image.ANTIALIAS)

# With this:

image = image.resize((width, height), Image.Resampling.LANCZOS)

Alternative Solutions

1. If you need backward compatibility:

try:

    from PIL import Image, ImageFilter

    resampling = Image.Resampling.LANCZOS

except ImportError:

    resampling = Image.ANTIALIAS

image = image.resize((width, height), resampling)

2. If you must use the old constant (not recommended):

Image.ANTIALIAS = Image.Resampling.LANCZOS  # Workaround for old code

Best Practice

Always use the current Resampling.LANCZOS method as it's the officially supported approach in modern Pillow versions. This ensures your code will keep working with future updates.

Remember to update your Pillow package regularly:

pip install --upgrade pillow