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Sun Feb 6 19:05:46 CET 2005 · https://mail.python.org/pipermail/python-dev/2005-February/051444.html

On Sun, 6 Feb 2005 10:49:05 -0600, Skip Montanaro <skip at pobox.com> wrote:
> 
> Wouldn't it be better to have the peephole optimizer recognize the throwaway
> nature of lists in these contexts:
> 
>     for elt in [1, 2, 4, 8, 16]:
>         ...
> 
>     if foo in [list, tuple]:
>         ...
> 
> (anywhere a list of constants immediately follows the "in" or "not in"
> keywords) and convert them into constants?  The cases you converted all
> matched that usage.

I think I implemented this once.  I'll try to see if I can find a
patch.  It wasn't too difficult, but I'm not sure if the patch was
clean.

Neal

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[Python-Dev] list of constants -> tuple of constants