[Python-Dev] Expression optimizations (original) (raw)
Steve Holden steve at holdenweb.com
Tue Feb 10 18:25:51 CET 2009
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Daniel Stutzbach wrote:
On Tue, Feb 10, 2009 at 11:16 AM, Steve Holden <steve at holdenweb.com_ _<mailto: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 notcontains, so you cannot define the inverse operation differently. "not a in b" and "a not in b" have exactly the same effects. Ah, right, that guarantees semantic equivalence. Sorry.
regards Steve
Steve Holden +1 571 484 6266 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/
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