[Numpy-discussion] Keywords in wrapped functions
Travis E. Oliphant
oliphant at enthought.com
Tue Jun 24 14:48:04 EDT 2008
Pierre GM wrote:
> All,
> Sorry to bumpt the post, accept my apologies for my rudeness, but I'm
> curious...
> So, let me rephrase my question:
>
> Many numpy functions (min, max, sum...) based on ndarray methods have a
> construction of the style
> #-----------------------------------------------
> def amin(a, axis=None, out=None):
> try:
> amin = a.min
> except AttributeError:
> return _wrapit(a, 'min', axis, out)
> return amin(axis, out)
> #-----------------------------------------------
>
> I'm wondering why the initial keywords arguments are transformed into
> positional arguments in the return. In the previous example, I would expect a
> line like
> return amin(axis=axis, out=out)
>
> [Actually, I would even prefer a
> return amin(axis=axis, out=out, **other_optional_parameters), which would
> permit to add some extra parameters such as a "fill_value", when dealing with
> masked arrays ?]
>
> Is this for efficiency purposes ?
>
>
>
The keyword arguments to the methods were added later and so positional
argument were initially necessary. I don't think they are now, but I
have not verified that.
-Travis
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