[Python-Dev] Expression optimizations (original) (raw)
Daniel Stutzbach daniel at stutzbachenterprises.com
Tue Feb 10 18:24:18 CET 2009
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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.
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