[Numpy-discussion] how can one catch a multiarray.error

Charles R Harris charlesr.harris@gmail....
Tue Jun 2 21:41:22 CDT 2009


On Tue, Jun 2, 2009 at 8:25 PM, Robert Kern <robert.kern@gmail.com> wrote:

> On Tue, Jun 2, 2009 at 21:20, Charles R Harris
> <charlesr.harris@gmail.com> wrote:
> >
> >
> > On Mon, Jun 1, 2009 at 8:43 PM, Robert Kern <robert.kern@gmail.com>
> wrote:
> >>
> >> On Mon, Jun 1, 2009 at 21:37,  <josef.pktd@gmail.com> wrote:
> >> > how do we catch a multiarray.error in a try except clause?
> >> >
> >> > e.g.
> >> >>>> np.argmin([])
> >> > Traceback (most recent call last):
> >> >  File "<pyshell#147>", line 1, in <module>
> >> >    np.argmin([])
> >> >  File
> >> > "C:\Programs\Python25\Lib\site-packages\numpy\core\fromnumeric.py",
> >> > line 631, in argmin
> >> >    return _wrapit(a, 'argmin', axis)
> >> >  File
> >> > "C:\Programs\Python25\Lib\site-packages\numpy\core\fromnumeric.py",
> >> > line 37, in _wrapit
> >> >    result = getattr(asarray(obj),method)(*args, **kwds)
> >> > multiarray.error: attempt to get argmax/argmin of an empty sequence
> >>
> >> try:
> >>   ...
> >> except numpy.core.multiarray.error:
> >>   ...
> >>
> >> Unfortunately, that is still a string exception. We should change that.
> >
> > I'm fixing these, but doesn't that constitute an abi change? Code that
> used
> > to catch the exceptions won't anymore.
>
> If they are catching numpy.core.multiarray.error, then it's not a
> problem. They never should have been catching "multiarray.error".
>

Well, I just removed them from  lib/src/_compiled_base.c also. I suppose
catching string errors from any of numpy's routines could be considered an
error, but it was the only way folks could do some of these things before.

Chuck
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