"Terry Reedy" <[EMAIL PROTECTED]> writes:
> "Arnaud Delobelle" <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]
>
> here is a very sophisticated implementation :)
>
>>>> def extract(indices, seq):
> ... return tuple(seq[i] for i in indices)
> ...
>>>> y, d = extract((0, 2), time.localtime())
>>>> y, d
> (2008, 12)
>
> ===================
> Or a generator version:
>
> # 3.0
> def extract(iterable, indexes):
> # assume indexes are all legal
> enext = enumerate(iterable).__next__
> i,item = enext()
> for index in indexes:
> while i < index:
> i,item = enext()
> yield item
>
> import time
> print(list(extract(time.localtime(), (0,2))))
>
> #prints [2008, 12]
but extract('python', (3, 1)) won't work!
--
Arnaud
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