array.itemsize: Documentation Versus Reality

[Lawrence D’Oliveiro]

On Saturday, September 17, 2016 at 3:47:15 PM UTC+12, I wrote:
>     >>> a = array.array("I", (0,))
>     >>> a.itemsize
>     4
>     >>> a = array.array("L", (0,))
>     >>> a.itemsize
>     8

Let me rephrase the question. It seems clear <https://docs.python.org/3/library/array.html> that “l” and “L” are not be relied on. As far as I can tell, on all current Python implementations, “i” and “I” have item sizes of 4, while “q” and “Q” have item sizes of 8.

Can anybody offer any counterexamples? If not, why does the documentation suggest that “i” and “I” could have an item size of 2?