How to loop backwards in python? [duplicate]

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I’m talking about doing something like:

for(i=n; i>=1; --i) {
   //do something with i
}

I can think of some ways to do so in python (creating a list of range(1,n+1) and reverse it, using while and --i, …) but I wondered if there’s a more elegant way to do it. Is there?

EDIT:
Some suggested I use xrange() instead of range() since range returns a list while xrange returns an iterator. But in Python 3 (which I happen to use) range() returns an iterator and xrange doesn’t exist.

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