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From: Ian Kelly <ian.g.kelly@gmail.com>
Date: Wed, 12 Mar 2014 16:40:00 -0600
Subject: Re: What does gc.get_objects() return?
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On Wed, Mar 12, 2014 at 4:35 PM, Ian Kelly <ian.g.kelly@gmail.com> wrote:
>> So not all optimizations are done that could be done.
>
> Or is it?
>
>>>> a = 1,2,3
>>>> gc.is_tracked(a)
> True
>>>> gc.collect()
> 0
>>>> gc.is_tracked(a)
> False

I guess the reason for this is that when PyTuple_New is called, it
knows how many elements it will contain but doesn't know yet what they
are, so it defers the issue by just going ahead and adding itself to
the GC