This is an excerpt from The Python Imaging Library Handbook, taken from the chapter The Image Module.

The Image Module

info #

im.info ⇒ dictionary

A dictionary holding data associated with the image. This dictionary is used by file handlers to pass on various non-image information read from the file. See documentation for the various file handlers for details.

Most methods ignore the dictionary when returning new images; since the keys are not standardized, it’s not possible for a method to know if the operation affects the dictionary. If you need the information later on, keep a reference to the info dictionary returned from the open method.

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