Use the built-in reversed() function:
>>> a = ["foo", "bar", "baz"]
>>> for i in reversed(a):
... print(i)
...
baz
bar
foo
To also access the original index, use enumerate() on your list before passing it to reversed():
>>> for i, e in reversed(list(enumerate(a))):
... print(i, e)
...
2 baz
1 bar
0 foo
Since enumerate() returns a generator and generators can't be reversed, you need to convert it to a list first.
Top answer 1 of 16
1825
Use the built-in reversed() function:
>>> a = ["foo", "bar", "baz"]
>>> for i in reversed(a):
... print(i)
...
baz
bar
foo
To also access the original index, use enumerate() on your list before passing it to reversed():
>>> for i, e in reversed(list(enumerate(a))):
... print(i, e)
...
2 baz
1 bar
0 foo
Since enumerate() returns a generator and generators can't be reversed, you need to convert it to a list first.
2 of 16
268
You can do:
for item in my_list[::-1]:
print item
(Or whatever you want to do in the for loop.)
The [::-1] slice reverses the list in the for loop (but won't actually modify your list "permanently").
Reddit
reddit.com › r/learnpython › iterate trough reverse list?
r/learnpython on Reddit: Iterate trough reverse list?
December 4, 2021 -
Hello - why is this code not working an i get an error:
l = [1,2,3] for i in l.reverse(): print(i)
and i get this error
Traceback (most recent call last):
File "C:\Users\Polzi\Documents\DEV\Python-Private\temp1.py", line 7, in <module>
for i in l.reverse():
TypeError: 'NoneType' object is not iterable
(NormalScraping) Only this code is working:
l = [1,2,3] l.reverse() for i in l: print(i)
Why is the first code not working?
Top answer 1 of 3
3
list.reverse() reverses the list in place and returns None. So for i in l.reverse(): is the same as for i in None:. You already figured out one solution. The other one is reversed(l), which will return the reversed list.
2 of 3
2
l.reverse reverses the list in-place, so you get None as a return value >>> l = [1,2,3] >>> print(l.reverse()) None and you can't run for i in None: obviously. If you mean to just run the for loop in reverse use reversed instead for i in reversed(l): As a sidenote, next time please use code blocks not code lines, as those will not be formatted when they're too long (as you can see with the exception message)
python - How do I reverse a list or loop over it backwards? - Stack Overflow
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)? More on stackoverflow.com
How do I use reverse list in Python to loop through a list backwards? - Ask a Question - TestMu AI Community
I want to iterate over a list in reverse order using Python. What’s the most efficient or Pythonic way to handle a python reverse list scenario, especially when looping? Are there any differences between using reversed() and slicing like my_list[::-1]? Would love a quick example! More on community.testmuai.com
0
July 2, 2025Differences in iteration through a loop in reverse order - Python
You can look up the Official Documentation on range() , to see what it does. The ::-1 notation is Slice Notation , while reversed() just returns an iterator. More on reddit.com
5
1
August 5, 2021loops - How to traverse a list in reverse order in Python (index-style: '... in range(...)' only) - Stack Overflow
I'm new to Python so I am still getting used to looping in this language. So, for example, I have the following code (the element type in the list is array) my_list = [array0, array1, array2, arr... More on stackoverflow.com
Videos
02:44
20 Ways You Can Reverse List in Python - YouTube
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Loop Over A List In Reverse | Python Example - YouTube
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Using reversed to loop in reverse in Python - YouTube
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02.1 Reverse looping array in python - Python List Exercises Tutorial ...
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"Reverse a List in Python" Tutorial: Three Methods & How-to Demos ...
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How to Reverse a List in Python? - YouTube
GeeksforGeeks
geeksforgeeks.org › python › backward-iteration-in-python
Backward iteration in Python - GeeksforGeeks
July 11, 2025 - Python provides various methods for backward iteration, such as using negative indexing or employing built-in functions like reversed(). Use reversed() method when we simply need to loop backwards without modifying original sequence or there ...
Real Python
realpython.com › python-reverse-list
Reverse Python Lists: Beyond .reverse() and reversed() – Real Python
June 28, 2023 - For example, to reverse the list represented in the diagram, you can loop over the first half of the list and swap the element at index 0 with its mirror at index -1 in the first iteration.
Stack Abuse
stackabuse.com › bytes › traversing-a-list-in-reverse-order-in-python
Traversing a List in Reverse Order in Python
August 30, 2023 - The reversed() function is the most Pythonic way to reverse a list. It's simple, readable, and efficient. It's especially useful when you need to iterate over the list in reverse order, but don't want to modify the original list.
Towards Data Science
towardsdatascience.com › home › latest › how to reverse python lists more efficiently
How To Reverse Python Lists More Efficiently | Towards Data Science
January 20, 2025 - >>> my_lst = [10, 0, 30, 25, 40, 100, 80] >>> my_lst_reverse_iter = reversed(my_lst) >>> my_lst_reverse_iter <list_reverseiterator object at 0x10afcae20> As you can see, the reversed() function returned an Iterator we can loop over it: >>> for ...
Codecademy
codecademy.com › article › how-to-reverse-a-list-in-python
How to Reverse a List in Python | Codecademy
In the first approach, reversed() is used with list() to create a new reversed list. In the second approach, reversed() is used directly in a for loop to iterate through elements in reverse order without creating a new list.
Top answer 1 of 16
1735
To get a new reversed list, apply the reversed function and collect the items into a list:
>>> xs = [0, 10, 20, 40]
>>> list(reversed(xs))
[40, 20, 10, 0]
To iterate backwards through a list:
>>> xs = [0, 10, 20, 40]
>>> for x in reversed(xs):
... print(x)
40
20
10
0
2 of 16
1542
>>> xs = [0, 10, 20, 40]
>>> xs[::-1]
[40, 20, 10, 0]
Extended slice syntax is explained here. See also, documentation.
TestMu AI Community
community.testmuai.com › ask a question
How do I use reverse list in Python to loop through a list backwards? - Ask a Question - TestMu AI Community
July 2, 2025 - I want to iterate over a list in reverse order using Python. What’s the most efficient or Pythonic way to handle a python reverse list scenario, especially when looping? Are there any differences between using reversed() and slicing like my_list[::-1]? Would love a quick example!
Medium
medium.com › becoming-a-better-software-developer › undetstanding-python-iterators-reversed-iteration-35f1c1d16196
Undetstanding Python Iterators: Reversed Iteration | by Saleem Latif | Becoming a better Software Developer | Medium
March 8, 2023 - In Python, you can reverse iterate over a sequence by using the reversed() function. The reversed() function returns an iterator that produces the elements of a sequence in reverse order.
Cherry Servers
cherryservers.com › home › blog › python › how to reverse a list in python (using 3 simple ways)
How to Reverse a List in Python (Using 3 Simple Ways) | Cherry Servers
November 7, 2025 - This method gives flexibility in customizing the reversal process. It is useful when more complex operations need to be performed during the reversal. Python’s reversed() function offers an easy method to reverse the elements of a list.
Kodeclik
kodeclik.com › iterate-through-a-list-in-reverse-python
How to Iterate over a List in Reverse Order
October 16, 2024 - To iterate over a list in reverse in Python 1. Use a negative step size in a loop. 2. Use the reversed() function. 3. Use slicing operators.
Delft Stack
delftstack.com › home › howto › python › python iterate list backwards
How to Iterate List Backwards in Python | Delft Stack
February 2, 2024 - We can traverse a list in Python in reverse order by using the inbuilt reversed() function available. The reversed() function returns the reversed iteration of the sequence provided as input.
Python Morsels
pythonmorsels.com › looping-in-reverse
Looping in reverse - Python Morsels
May 27, 2025 - If you're working with a list, a string, or any other sequence in Python, you can reverse that sequence using Python's slicing syntax: >>> colors = ["purple", "blue", "green", "pink", "red"] >>> colors[::-1] ['red', 'pink', 'green', 'blue', 'purple'] The syntax looks weird, but it does work. If we wanted to write a for loop that iterated over our list from the end to the beginning, we could loop over the reversed slice of that list:
Reddit
reddit.com › r/learnprogramming › differences in iteration through a loop in reverse order - python
r/learnprogramming on Reddit: Differences in iteration through a loop in reverse order - Python
August 5, 2021 -
So I'm building a game that requires me to loop through a list in reverse order.
It seems that there are multiple ways to do this same task, but I want to make sure I understand the differences between the alternative ways.
From what I have found online:
I can use list comprehension -
for _ in desired_list[::-1]
I can use reversed() -
for _ in revered(desired_list)
I can use a range() -
for _ in range(len(desired_list) -1, 0, -1)
Is there any functional difference between these?
Also for the range iteration, could you verify what each number stands for?
It seems to be:
range("number to start on", "number to end up", "direction and distance to travel in list")
Is that correct?
Thank you for any help!
Top answer 1 of 2
1
You can look up the Official Documentation on range() , to see what it does. The ::-1 notation is Slice Notation , while reversed() just returns an iterator.
2 of 2
1
Your almost correct about range… the first number is indeed the start point, and the third is the stride (and yes sign determines direction) but the second number is the exclusive end point. The end will actually end one stride before the end. As for functional differences: slicing (that isn’t actually a comprehension) a list in reverse order creates an entirely new copy of the list, so you’ll be consuming extra memory equal to the size of the iterator being reversed… this overhead may not actually matter to you, but you’ll still be paying the price. The reversed built-in saves you that memory… it’s effectively doing what you’re doing in the range version, then returning an iterator… very little extra memory is used, as all it needs to keep track of is where it is currently in the thing being reversed… however it’s not very flexible if you don’t want to start at the end, end at the start, and always step by 1. The range version gives you all of that back, though it’s not as readable when used for the most common case of just reversing the whole thing.
Top answer 1 of 3
5
Avoid looping with range, just iterate with a for loop as a general advice.
If you want to reverse a list, use reversed(my_list).
So in your case the solution would be:
my_list = reversed([array0,array1,array2,array3])
That gives you [array3, array2, ...]
For omitting the last array from the reversed list, use slicing:
my_list = reversed([array0,array1,array2,array3])[:-1]
So your code turns to a one liner :-)
2 of 3
1
You can traverse a list in reverse like so:
for i in range(len(lis), 0, -1):
print (i)
To stop at the second element edit your range() function to stop at 1:
for i in range(len(lis), 1, -1):
print (i)
Linuxize
linuxize.com › home › python › python list reverse
Python List reverse | Linuxize
August 25, 2020 - To reverse a Python list in place, use the reverse() method. If you only need to create a reversed iterator, use the reversed() function.
Bobby Hadz
bobbyhadz.com › blog › python-enumerate-reverse-order
Iterate over a List or String in Reverse order in Python | bobbyhadz
April 9, 2024 - Use the enumerate() function to get access to the index. Convert the enumerate object to a list and reverse the list. Use a for loop to iterate over the list in reverse order.
Codecademy Forums
discuss.codecademy.com › frequently asked questions › python faq
How can I iterate over a list backward? - Python FAQ - Codecademy Forums
November 3, 2018 - Answer There are a few ways that you can iterate over a list backward. One way is by utilizing the range() method, with a negative step value, so that the index decreases by 1 per element, essentially going backward in the list.
Sololearn
sololearn.com › en › Discuss › 2295438 › how-do-i-iterate-over-a-list-in-reverse-order
How do I iterate over a list in reverse order? | Sololearn: Learn to code for FREE!
pythonlists · 15th May 2020, 5:27 ... PM · Abhay · + 3 · If you mean looping through a list in reverse, use: for x in reversed(range(len(list))): 15th May 2020, 5:34 PM · Yamen Ghozlan · + 3 · I see that you uused the word ...