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From: Chris Angelico <rosuav@gmail.com>
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Subject: Re: REMOVE ME
Date: Sun, 10 Apr 2016 13:52:07 +1000
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Xref: csiph.com comp.lang.python:106773

On Sun, Apr 10, 2016 at 1:46 PM, fan nie <niefan68@gmail.com> wrote:
>
> --
> https://mail.python.org/mailman/listinfo/python-list

Sure. I presume you mean something like this:

class Thing:
    things = []
    def __init__(self):
        self.things.append(self)
    def __del__(self):
        # Remove me when I'm dead
        self.things.remove(self)

This ingenious technique guarantees that you never have dead objects
in your list, by having each object remove itself when it dies.

ChrisA