[Numpy-discussion] how can one catch a multiarray.error
Charles R Harris
charlesr.harris at gmail.com
Mon Jun 1 23:06:05 EDT 2009
On Mon, Jun 1, 2009 at 8:37 PM, <josef.pktd at 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
>
What numpy version are you using? A ValueError is raised in recent versions:
In [1]: np.argmin([])
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
/home/charris/<ipython console> in <module>()
/usr/lib/python2.5/site-packages/numpy/core/fromnumeric.pyc in argmin(a,
axis)
629 argmin = a.argmin
630 except AttributeError:
--> 631 return _wrapit(a, 'argmin', axis)
632 return argmin(axis)
633
/usr/lib/python2.5/site-packages/numpy/core/fromnumeric.pyc in _wrapit(obj,
method, *args, **kwds)
35 except AttributeError:
36 wrap = None
---> 37 result = getattr(asarray(obj),method)(*args, **kwds)
38 if wrap:
39 if not isinstance(result, mu.ndarray):
ValueError: attempt to get argmax/argmin of an empty sequence
Chuck
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