[Numpy-discussion] changing ValueError to KeyError for bad field access

Phil Hodge hodge at stsci.edu
Fri Jun 12 14:06:44 EDT 2015

On 06/12/2015 01:46 PM, Allan Haldane wrote:
> I think it would be very nice to make access to invalid fields of a
> structured array give a KeyError instead of a ValueError. Like:
>      >>> a = np.ones(3, dtype=[('a', 'f4'), ('b', 'f4')])
>      >>> a['c']
>      KeyError: 'c'

This will break code, but it should do so in a way that's visible.  
KeyError does seem like a more appropriate exception to me.


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