[issue41220] add optional make_key argument to lru_cache

[Jim Jewett]

Jim Jewett <jimjjewett at gmail.com> added the comment:

Going back to Raymond's analysis, this is useful when at least some of the parameters either do not change the result, or are not hashable.

At a minimum, you need to figure out which parameters those are, and whether to drop them or transform them.

Is this already sufficiently rare or tricky that a subclass is justified, instead of trying to shoehorn things into a single key method?

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nosy: +Jim.Jewett

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