Eric Wieser <wieser.e...@gmail.com> added the comment:
> Revising the code example to use an empty array
I think you mean
>>> import array
>>> memoryview(array.array('H', [])).itemsize
2
Your example is an array containing 0, not an empty array - but the conclusion
is the same.
> It is technically un-necessary as it can be obtained using
> PyBuffer_SizeFromFormat
This obviously predicates on `PyBuffer_SizeFromFormat` being implemented, which
according to the docs it is not.
> I think that the grammar would allow for an empty record "T{}" that would
> have itemsize 0 but is of little use inside numpy.
It also allows for records of empty arrays, "T{(0)d:data:}". While these are of
little use, they _are_ supported by both ctypes and numpy, so we should support
them in the PEP3118 interface used between them.
----------
nosy: +Eric Wieser
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