[Tutor] Multiple Simultaneous Loops

[Ed Singleton]

Wonderful, thank you all of you.

zip, enumerate, and count seem to do everything I want, though I do think

for f, x in bunch_of_files, range(z):

is a little more intuitive than

for f, x in zip(bunch_of_files, range(z)):

Thanks

Ed

On 15/09/05, Kent Johnson <kent37 at tds.net> wrote:
> Ed Singleton wrote:
> > I roughly want to be able to do:
> >
> > for f, x in bunch_of_files, range(z):
> >
> > so that x iterates through my files, and y iterates through something else.
> >
> > Is this something I can do?
> 
> In the general case use zip():
> for f, x in zip(bunch_of_files, range(z)):
> 
> In this case, where the second item is just the index to the loop, use enumerate() instead of range() and zip()
> for x, f in enumerate(bunch_of_files):
> 
> > If so, what would be the best way to create a range of indeterminate length?
> 
> itertools.count() generates an "unlimited" sequence.
> 
> > If not, is there a nice way I can do it, rather than than incrementing
> > a variable (x = x + 1) every loop?
> >
> > Or maybe can I access the number of times the loop has run?  ('x = x +
> > 1' is so common there must be some more attractive shortcut).
> 
> enumerate()
> 
> > So far in learning Python I've founbd that when I feel you should be
> > able to do something, then you can.
> 
> Yep :-)
> 
> Kent
> 
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