switch recipe?
Christian Tanzer
tanzer at swing.co.at
Sat Jul 13 05:48:22 EDT 2002
"Mark McEahern" <marklists at mceahern.com> wrote:
> > So where I've ended up is a place I'm sure there's some fancy
> > name for--but I don't know it.
>
> The thread on zip suggests the term "lockstep iteration." I can't use
> map or zip though because I have an unbounded iterator.
Not so. As long as one of the iterators is finite, zip will work:
>>> from __future__ import generators
>>> def repeat(*args):
... """Return a repeating alternator for args."""
... while args:
... for a in args:
... yield a
...
>>> for i, j in zip(range(5), repeat("a","b","c")):
... print i, j
...
0 a
1 b
2 c
3 a
4 b
--
Christian Tanzer tanzer at swing.co.at
Glasauergasse 32 Tel: +43 1 876 62 36
A-1130 Vienna, Austria Fax: +43 1 877 66 92
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