[Answer]-What does pre_save and post_save do in django?

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You probably skipped the introduction to signals in the docs:

Django includes a “signal dispatcher” which helps allow decoupled
applications get notified when actions occur elsewhere in the
framework. In a nutshell, signals allow certain senders to notify a
set of receivers that some action has taken place.

Let’s say you want to create a slug you have basically two options:

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