Unexpected PendingDeprecationWarning

[Nathan Ernst]

Thanks, ChrisA

On Tue, Nov 22, 2016 at 9:24 PM, Chris Angelico <rosuav at gmail.com> wrote:

> On Wed, Nov 23, 2016 at 2:14 PM, Nathan Ernst <nathan.ernst at gmail.com>
> wrote:
> > I was not aware of that PEP.
> >
> > The logic in my function is exactly as desired, so to squelch the
> warning,
> > I merely wrapped the iteration in a try/except:
> >
> > def adjacent_difference(seq, selector=identity):
> >   i = iter(seq)
> >   l = selector(next(i))
> >   try:
> >     while True:
> >       r = selector(next(i))
> >       yield r - l
> >       l = r
> >   except StopIteration:
> >     return
>
> You'll probably want to move the 'try' up one line - unless you want
> an exception if the sequence is empty. And it's exactly this kind of
> ambiguity that this change helps to catch.
>
> ChrisA
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