[Numpy-discussion] Type checking inconsistency

Tony Yu tsyu80@gmail....
Sun Oct 16 12:02:53 CDT 2011


On Sun, Oct 16, 2011 at 12:49 PM, Pauli Virtanen <pav@iki.fi> wrote:

> (16.10.2011 18:39), Tony Yu wrote:
> >  >>> import numpy as np
> >  >>> a = np.arange(10)
> >  >>> b = np.ones(10, dtype=np.uint8)
> >
> > # this runs without error
> >  >>> b[:5] = a[:5]
> >
> >  >>> mask = a < 5
> >  >>> b[mask] = b[mask]
> > TypeError: array cannot be safely cast to required type
>
> Seems to be fixed in Git master
>
>  >>> import numpy as np
>  >>> a = np.arange(10)
>  >>> b = np.ones(10, dtype=np.uint8)
>  >>> mask = a < 5
>  >>> b[mask] = b[mask]
>  >>> b[mask] = a[mask]
>  >>> np.__version__
> '2.0.0.dev-1dc1877'
>

(I see you noticed the typo in my original example: b --> a). Agreed, I'm
getting this error with an old master. I just tried master and it worked
fine, but the maintenance branch ('1.6.2.dev-396dbb9') does still have this
issue.
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