I'm coming from Tcl-world ... (fwd)
Lulu of the Lotus-Eaters
mertz at gnosis.cx
Sat Aug 3 19:35:10 EDT 2002
Heiko Wundram <heikowu at ceosg.de> wrote previously:
|for x in range(0,42):
| s *= 2
| <blah>
| if <more blah>:
| continue
| <even more blah>
|Doesn't look all the more complicated, does it? Just loop over one
|variable, and specify all that extra stuff in the loop itself... :)
You can also put multiple names in the for expression itself. What you
are actually doing if you do this is creating a tuple, but the effect is
to provide multiple loop variables. Rewriting Wundram's example in this
style:
for x, s in [(n, 2**n) for n in range(0,42)]:
<do something with x and s>
if <more blah>:
continue
<even more blah>
Also, if the multiple loop terms are more independent than the example,
look at the zip() builtin function (it creates a sequence of tuples out
of two or more sequences).
Yours, Lulu...
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