looping through a file
staschuk at telusplanet.net
Wed Apr 30 16:23:25 CEST 2003
Quoth Andrew Bennetts:
> I thought there might be something in 2.3's itertools module to help with
> this -- I was hoping you'd be able to write something like:
> InFile = open('users.dat', 'r')
> for username, password in multistep(InFile, 2):
Such a function (with a name something like group) has been
proposed, but I don't think it's in itertools yet.
> I couldn't see anything in itertools to save me writing that out. But I
> just figured out how to do it with itertools -- izip can do it:
> def multistep(iterable, count):
> return itertools.izip(*((iter(iterable),)*count))
Heh. That's a clever implementation. (Perhaps too clever.)
> So it's probably not worth defining a seperate function...
Imho a separate function is desirable for clarity.
Steven Taschuk staschuk at telusplanet.net
"I'm always serious, never more so than when I'm being flippant."
-- _Look to Windward_, Iain M. Banks
More information about the Python-list