On Fri, 04 May 2018 15:27:02 +0200, Thomas Jollans wrote:
>>>> spamgetter = (lambda seq, i=2, fallback="spam":
> ... seq[i] if abs(i) < len(seq) or i == -len(seq)
> ... else fallback)
>>>> spamgetter("abcd", i=-4)
> 'a'
>>>> spamgetter("abcd")
> 'c'
>>>> spamgetter("")
> 'spam'
Doh! Obvious in hindsight. Thanks.
And on my computer, it's only 125% slower than itemgetter.
> Making this work for sequences AND dict-like objects is more
> difficult...
Indeed. At least with dicts you can call .get(). I don't think it is
necessary to have the one lambda handle both sequence and dict cases.
Surely when calling it you know whether or not you are looking at a
sequence or a mapping.
--
Steve
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