[docs] [issue15436] __sizeof__ is not documented
Serhiy Storchaka
report at bugs.python.org
Sun Jul 29 18:57:21 CEST 2012
Serhiy Storchaka added the comment:
> sys.getsizeof is certainly CPython-specific. However, __sizeof__ is not
> just an implementation detail of sys.getsizeof, just as __len__ is not an
> implementation detail of len(). Authors of extension types are supposed to
> implement it if object.__sizeof__ is incorrect.
I think there is one difference between __len__ and __sizeof__. __sizeof__
should be overloaded only for C-implemented classes. IMHO, it is a part of C
API.
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