[issue40114] support maxsize argument for lru_cache's user_function option

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

You can use lru_cache(maxsize=128, typed=False)(user_function). lru_cache should support a function as an argument on if it is a single positional argument, this is the purpose. So you can write

@lru_cache
def func(...):
    ...

instead of

@lru_cache()
def func(...):
    ...

When you pass maxsize and typed you do not pass a function as an argument of lru_cache, you pass it as an argument of the decorator created by the lru_cache() call.

@lru_cache(maxsize=128, typed=False)
def func(...):
    ...

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nosy: +serhiy.storchaka

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<https://bugs.python.org/issue40114>
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