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[2.1.x] Refs #29478 -- Doc'd how to use cached_property with a mangled name.

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Backport of 09199734d383691ecf6d163894b447ca45e0ef82 from master
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Sergey Fedoseev 2018-07-09 21:13:31 +05:00 committed by Tim Graham
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docs/ref/utils.txt
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@ -505,6 +505,15 @@ https://web.archive.org/web/20110718035220/http://diveintomark.org/archives/2004
z = person.friends # does not call
x is z # is True
.. warning::
``cached_property`` doesn't work properly with a mangled__ name unless
it's passed a ``name`` of the form ``_Class__attribute``::
__friends = cached_property(get_friends, name='_Person__friends')
__ https://docs.python.org/3/faq/programming.html#i-try-to-use-spam-and-i-get-an-error-about-someclassname-spam
.. function:: keep_lazy(func, *resultclasses)
Django offers many utility functions (particularly in ``django.utils``)