Sets in Python

[Chris Mellon]

On 9/20/07, OKB (not okblacke) <brenNOSPAMbarn at nobrenspambarn.net> wrote:
> Steven D'Aprano wrote:
>
> > But of course you can't look up the dict by value, only by
> > identity. But that's what you wanted.
>
>         Actually, if I understand the OP's examples right, he wants to look
> up only by value, not by identity.
>

He's switched at least twice, as I understand his writing. Currently,
he appears to want to look up by value, copying lists on insertion,
and is ignoring what happens if you mutate the key.