From 902bcd9a1e2c73c6de5510b771c590b618c4c94e Mon Sep 17 00:00:00 2001 From: Raymond Hettinger Date: Fri, 14 Sep 2018 00:53:20 -0700 Subject: [PATCH] Note that distinct argument patterns can be cached separately (GH-9298) --- Doc/library/functools.rst | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Doc/library/functools.rst b/Doc/library/functools.rst index 1b94f339600..214d57334c8 100644 --- a/Doc/library/functools.rst +++ b/Doc/library/functools.rst @@ -85,6 +85,11 @@ The :mod:`functools` module defines the following functions: Since a dictionary is used to cache results, the positional and keyword arguments to the function must be hashable. + Distinct argument patterns may be considered to be distinct calls with + separate cache entries. For example, `f(a=1, b=2)` and `f(b=2, a=1)` + differ in their keyword argument order and may have two separate cache + entries. + If *maxsize* is set to ``None``, the LRU feature is disabled and the cache can grow without bound. The LRU feature performs best when *maxsize* is a power-of-two.