4. Image show

See: https://pillow.readthedocs.io/en/stable/reference/Image.html#PIL.Image.Image.show

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4.1. Show

Use the .show() method to open the image using the default app.

In Windows, the default app is usually Photos.

The code below opens an image and shows it.

A temporary file is created for display.

from PIL import Image

with Image.open("tri.jpg") as im:
    im.show()