Mike Kent wrote:
> robert wrote:
>> I want to use a computation cache scheme like
>>>>>> o = CACHECOMPUTE complex-key-expr expensive-calc-expr
>>>>>> frequently and elegantly without writing complex-key-expr or expensive-calc-expr twice.
>> So its ugly:
>>>> _=complex-key-expr; o=cache.get(_) or cache.setdefault(_,expensive-calc-expr)
>>>> Any ideas?
>>>> -robert
>> Your question is a bit terse, so my answer might not be spot on for it,
> but it sounds like you want what is typically called 'memoization',
> whereby a function caches its expensive-to-calculate return values,
> where the cache is keyed by the function arguments.
>> See:
>http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52201> and various other implimentations in the Cookbook for details.
>
thanks, yes, but the challenge was to hook expressions for memoizing ad hoc. See above solution.
