[Numpy-discussion] feedback request: proposal to add masks to the core ndarray

[Matthew Brett]

Hi,

Just as a use case, if I do this:

a = np.zeros((big_number,), dtype=np.int32)
a[0,0] = np.NA

I think I'm right in saying that, with the array.mask implementation
my array memory usage with grow by new big_number bytes, whereas with
the np.naint32 implementation you'd get something like:

Error('This data type does not allow missing values')

Is that right?

See y'all,

Matthew