On Wed, Aug 26, 2015 at 7:32 AM, Charles R Harris <charlesr.harris@gmail.com> wrote:

On Wed, Aug 26, 2015 at 7:31 AM, Charles R Harris <charlesr.harris@gmail.com> wrote:

On Wed, Aug 26, 2015 at 7:11 AM, Antoine Pitrou <solipsis@pitrou.net> wrote:

On Tue, 25 Aug 2015 10:26:02 -0600
Charles R Harris <charlesr.harris@gmail.com> wrote:
> Hi All,
>
> The silence after the 1.10 beta has been eerie. Consequently, I'm thinking
> of making a first release candidate this weekend. If you haven't yet tested
> the beta, please do so. It would be good to discover as many problems as we
> can before the first release.

Has typing of ufunc parameters become much stricter? I can't find
anything in the release notes, but see (1.10b1):

>>> arr = np.linspace(0, 5, 10)
>>> out = np.empty_like(arr, dtype=np.intp)
>>> np.round(arr, out=out)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/antoine/np110/lib/python3.4/site-packages/numpy/core/fromnumeric.py", line 2778, in round_
    return round(decimals, out)
TypeError: ufunc 'rint' output (typecode 'd') could not be coerced to provided output parameter (typecode 'l') according to the casting rule ''same_kind''


It used to work (1.9):

>>> arr = np.linspace(0, 5, 10)
>>> out = np.empty_like(arr, dtype=np.intp)
>>> np.round(arr, out=out)
array([0, 1, 1, 2, 2, 3, 3, 4, 4, 5])
>>> out
array([0, 1, 1, 2, 2, 3, 3, 4, 4, 5])

The default casting mode has been changed. I think this has been raising a warning since 1.7 and was mentioned as a future change in 1.10, but you are right, it needs to be mentioned in the 1.10  release notes.

Make that warned of in the 1.9.0 release notes.

Here it is in 1.9.0 with deprecation warning made visible.
```
In [3]: import warnings

In [4]: warnings.simplefilter('always')

In [5]: arr = np.linspace(0, 5, 10)

In [6]: out = np.empty_like(arr, dtype=np.intp)

In [7]: np.round(arr, out=out)
/home/charris/.local/lib/python2.7/site-packages/numpy/core/fromnumeric.py:2640: DeprecationWarning: Implicitly casting between incompatible kinds. In a future numpy release, this will raise an error. Use casting="unsafe" if this is intentional.
  return round(decimals, out)
Out[7]: array([0, 1, 1, 2, 2, 3, 3, 4, 4, 5])
```

Chuck

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