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From: Ian Kelly <ian.g.kelly@gmail.com>
Date: Sat, 28 Feb 2015 01:48:44 -0700
Subject: Re: Python Worst Practices
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On Fri, Feb 27, 2015 at 9:42 PM, Dan Sommers <dan@tombstonezero.net> wrote:
> I don't think I've ever used the builtin function id in a program.
> Ever.  Not even once.  Honestly, what is a valid use case?

If you have a dict that you want to key on object identity rather than
equality, then you can use object ids as the keys.