xslice idea | a generator slice
Russel Walker
russ.pobox at gmail.com
Thu Jul 11 12:21:16 EDT 2013
> > def __init__(self, seq, *stop):
>
>
>
> Wouldn't it be better if it has the same signature(s) as itertools.islice?
That's actually what I was going for, except I was modeling it after range, but that was the only way I knew to implement it.
> > if len(stop) > 3:
>
> > raise TypeError("xslice takes at most 4 arguments")
>
> > elif len(stop) < 0:
>
>
>
> How would len(stop) be negative?
Yes, that should've been len(stop) < 1.
> Or you can use itertools.imap:
>
>
>
> def xslice(sequence, start_or_stop, *args):
>
> indices = xrange(*slice(start_or_stop, *args).indices(len(sequence)))
>
> return imap(sequence.__getitem__, indices)
>
>
>
>
>
> Oscar
I like the way you did that with imap, although I still like my parameter implementation.
To confess, this is the second time I've made the mistake of trying to implement generator like functionality of a builtin when there already is on in itertools. Need to start studying that module abit more I think. I'm looking at the docs now and I see there are actually a couple of isomethings().
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