[issue41280] lru_cache on 0-arity functions should default to maxsize=None

[Raymond Hettinger]

Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:

In 3.9, the @cache() alias is provided as a cleaner way to create an unbounded cache.¹  There is no need to special case a zero-arity function.  Besides as Rémi and Serhiy have pointed out, we can't know the arity in advance.

¹ https://docs.python.org/3.9/library/functools.html#functools.cache

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resolution:  -> out of date
stage:  -> resolved
status: open -> closed

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