[Numpy-discussion] NotImplemented returns

[josef.pktd at gmail.com]

On Thu, May 27, 2010 at 12:57 PM, Pauli Virtanen <pav at iki.fi> wrote:
> Thu, 27 May 2010 10:21:14 -0600, Charles R Harris wrote:
> [clip]
>> Maybe an enhancement ticket. The NotImplemented return is appropriate
>> for some functions, but for functions with a single argument we should
>> probably raise an error.
>
> A NotImplemented value leaking to the the user is a bug. The function
> should raise a ValueError instead.
>
> NotImplemented is meant only for use as a placeholder singleton in
> implementation of rich comparison operations etc., and we shouldn't
> introduce any new meanings IMHO.

http://projects.scipy.org/numpy/ticket/1494  with a few examples

I don't know which component

Josef


>
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> Pauli Virtanen
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