How many is "too many" with lists?

[Courageous]

Neel Krishnaswami wrote:
> 
> Courageous <jkraska1 at san.rr.com> wrote:
> >
> > Well, this is a bit off the subject, but in recent Python
> > misadventures, I'm pretty sure that
> >
> > for i in range ( 1000000 ):
> >
> > definitely isn't the right way to loop............
> 
> You can use xrange(), which doesn't allocate a whole list, but instead
> returns an object with __getitem__ methods that return the right
> integers to emulate a range. When you need to loop over 10 million
> elements it becomes helpful. :)

Thanks! I was writing:


x = 1000000
while x > 0
	dosomething()
	x = x - 1

That seemed overbearing. So you're saying that

for x in xrange ( 1000000 )
	dosomething()

is equally unexpensive?






C/