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Mon Mar 20 16:18:30 EDT 2017 · https://mail.python.org/pipermail/python-dev/2017-March/147636.html

On Mon, 20 Mar 2017 13:26:34 +0200
Serhiy Storchaka <storchaka at gmail.com> wrote:
> What is the preferable way of getting the size of tuple, list, bytes, 
> bytearray: Py_SIZE or PyTuple_GET_SIZE, PyList_GET_SIZE, 
> PyBytes_GET_SIZE, PyByteArray_GET_SIZE? Are macros for concrete types 
> more preferable or they are outdated?

+1 for using concrete macros.  Py_SIZE is a low-level internal thing
(e.g. it will return a negative size on negative ints).

Regards

Antoine.

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[Python-Dev] Py_SIZE vs PyXXX_GET_SIZE