[issue38524] functools.cached_property is not supported for setattr

[Serhiy Storchaka]

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

You have to call __set_name__() if you create a cached_property dynamically outside of the class namespace.

p = cached_property(age)
p.__set_name__(cls, 'age3')
cls.age3 = p

(And setattr() is not needed here.)

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nosy: +serhiy.storchaka

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<https://bugs.python.org/issue38524>
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