How do I iterate over a list in reverse in Python? See also: How can I get a reversed copy of a list (avoid a separate statement when chaining a method after .reverse)?

Jul 21, 2011 · Believe it or not, after profiling my current code, the repetitive operation of numpy array reversion ate a giant chunk of the running time. What I have right now is the common view-based …

Nit: " Slicing Python lists always creates copies "—except when they are assigned to, as in a[2:4] = reversed(a[2:4]) in the OP's example. People may be led to think that x = reversed(x) and x.reverse() …

Feb 10, 2009 · How do I traverse a list in reverse order in Python? So I can start from collection[len(collection)-1] and end in collection[0]. I also want to be able to access the loop index.

Oct 19, 2008 · I want to have a function that will return the reverse of a list that it is given -- using recursion. How can I do that?

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.

Apr 16, 2017 · Sort a list in reverse order Asked 8 years, 8 months ago Modified 1 year, 11 months ago Viewed 72k times

This mirrors the python list reversal syntax lst[::-1] and is clear in its intent. With the loc syntax, you are also able to slice columns if required, so it is a bit more flexible. Some points to consider while …

Sep 2, 2011 · Using "reversed" with python generator (assuming we ware talking of Python 3 range built-in) is just conceptually wrong and teaches wrong habits of not considering memory/processing …

Oct 31, 2020 · It really depends on what you want in your program. If you simply want to show how the reversed list looks like, use slicing or reversed (). You can of course use them like the first method - …