On Tue, Apr 12, 2011 at 11:56 AM, Robert Kern <robert.kern@gmail.com> wrote:

On Tue, Apr 12, 2011 at 12:27, Charles R Harris
<charlesr.harris@gmail.com> wrote:

> IIRC, the behavior with respect to scalars sort of happened in the code on
> the fly, so this is a good discussion to have. We should end up with
> documented rules and tests to enforce them. I agree with Mark that the tests
> have been deficient up to this point.

It's been documented for a long time now.

http://docs.scipy.org/doc/numpy/reference/ufuncs.html#casting-rules

Nope, the kind stuff is missing. Note the cast to float32 that Mark pointed out. Also that the casting of python integers depends on their sign and magnitude.

In [1]: ones(3, '?') + 0
Out[1]: array([1, 1, 1], dtype=int8)

In [2]: ones(3, '?') + 1000
Out[2]: array([1001, 1001, 1001], dtype=int16)

Chuck