[Numpy-discussion] except expression discussion on python-ideas

[Benjamin Root]

So, this is kind of like Perl's "unless"?


On Tue, Feb 18, 2014 at 10:18 PM, Alexander Belopolsky <ndarray at mac.com>wrote:

> I would like to invite numpy community to weigh in on the idea that is
> getting momentum at
>
> https://mail.python.org/pipermail/python-ideas/2014-February/025437.html
>
> The main motivation is to provide syntactic alternative to proliferation
> of default value options, so that
>
> x = getattr(u, 'answer', 42)
>
> can be written as
>
> x = y.answer except ... 42
>
> For a dictionary d,
>
> x = d.get('answer', 42)
>
> can be written as
>
> x = d['answer'] except ... 42
>
> For a list L,
>
> try:
>     x = L[i]
> except IndexError:
>     x= 42
>
> can be written as
>
> x = L[i] except ... 42
>
>
> The ellipsis in the above stands for syntax being debated.
>
> Effectively, Python is about to gain support for a new operator and
> operators are very precious for numpy.  So, I think numpy community has a
> horse in that race.
>
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