Steven D'Aprano wrote:
Memoisation isn't "esoteric", it is a simple, basic and widely-used technique used to improve performance of otherwise expensive functions.
That may be true, but I don't think it's a good example of a use for a shared, mutable default value, because it's arguably an *abuse* of the default value mechanism. Whenever I want to cache function values, I use a module level variable to hold the cache. It's clearer, and it doesn't clutter the function signature with something that isn't logically a part of it at all. -- Greg -- https://mail.python.org/mailman/listinfo/python-list
