[Numpy-discussion] Inconsistent output dtype in mixed scalar-array operations

[Olivier Delalleau]

Hi,

I opened a ticket about this (http://projects.scipy.org/numpy/ticket/1827),
but thought I'd also ask on the mailing list whether this is working as
intended.

It looks like the resulting dtype of a "+" operation between a scalar and an
array can depend on the order of the arguments. This seems wrong.

Tested with numpy 1.5.1 under Ubuntu 11.04 (64-bit).

In [4]: (numpy.array(0, dtype='uint16') + numpy.array([1],
dtype='int8')).dtype
Out[4]: dtype('int16')

In [6]: (numpy.array([1], dtype='int8') + numpy.array(0,
dtype='uint16')).dtype
Out[6]: dtype('int8')

Thanks for any feedback,

-=- Olivier
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