From 380d443a6ac73cb4719d86fd5781544630bcec5e Mon Sep 17 00:00:00 2001 From: "Miss Islington (bot)" <31488909+miss-islington@users.noreply.github.com> Date: Fri, 18 Oct 2019 00:21:05 -0700 Subject: Doc: Add missing entry for functools.cached_property (GH-16803) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit (cherry picked from commit 93b81e1fcbeb61c1b49ac2fa52c5a0dff929940b) Co-authored-by: Stéphane Wirtel --- Doc/whatsnew/3.8.rst | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/Doc/whatsnew/3.8.rst b/Doc/whatsnew/3.8.rst index e1388e2169..ef4209f9db 100644 --- a/Doc/whatsnew/3.8.rst +++ b/Doc/whatsnew/3.8.rst @@ -685,6 +685,22 @@ than as a function returning a decorator. So both of these are now supported:: (Contributed by Raymond Hettinger in :issue:`36772`.) +Added a new :func:`functools.cached_property` decorator, for computed properties +cached for the life of the instance. :: + + import functools + import statistics + + class Dataset: + def __init__(self, sequence_of_numbers): + self.data = sequence_of_numbers + + @functools.cached_property + def variance(self): + return statistics.variance(self.data) + +(Contributed by Carl Meyer in :issue:`21145`) + gc -- -- cgit v1.2.1