[Python-Dev] Expression optimizations

[Daniel Stutzbach]

On Tue, Feb 10, 2009 at 11:16 AM, Steve Holden <steve at holdenweb.com> wrote:

> That's true, but the same *could* be said about the existing
> optimizations for objects that define their own __contains__.
>

No, because there isn't a __not_contains__, so you cannot define the inverse
operation differently.  "not a in b" and "a not in b" have exactly the same
effects.

--
Daniel Stutzbach, Ph.D.
President, Stutzbach Enterprises, LLC <http://stutzbachenterprises.com>
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