On 8/14/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> > im not sure try/except is faster here - im pretty sure a missing
> > key is likely and exception throws are very expensive.  would be
> > worth a try to see if the missing key exception actually occurs
> > here.
> i'll have to check, last 3 years i've being doing everything assuming
> that a (lookup:exception) is faster than
> (lookup-if-lookup:lookup-else) in both attribute and dict lookups.

Only if, like Mike said, the common case is for the key to be present.

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