Sets are not ordered. So, the sets {1, 2, 3} and {3, 2, 1} are essentially the same.
You must use lists if you want ordered elements.
list1 = [1, 2, 3]
list2 = list1[::-1]
print(list2)
Output is
>>> [3, 2, 1]
EDIT: If you want to use for loop:
list1 = [1, 2, 3]
list2 = []
for x in range(len(list1)-1, -1, -1):
list2.append(list1[x])
print(list2)
The logic of this code is:
The range(a, b, c) function takes 3 arguments : from a to (b-1) with each step of c.
So, we move from the last element (len(list1)-1) of the list1 upto the first element -1 with a step of -1, so that it decreases with each step.
Top answer 1 of 4
5
Sets are not ordered. So, the sets {1, 2, 3} and {3, 2, 1} are essentially the same.
You must use lists if you want ordered elements.
list1 = [1, 2, 3]
list2 = list1[::-1]
print(list2)
Output is
>>> [3, 2, 1]
EDIT: If you want to use for loop:
list1 = [1, 2, 3]
list2 = []
for x in range(len(list1)-1, -1, -1):
list2.append(list1[x])
print(list2)
The logic of this code is:
The range(a, b, c) function takes 3 arguments : from a to (b-1) with each step of c.
So, we move from the last element (len(list1)-1) of the list1 upto the first element -1 with a step of -1, so that it decreases with each step.
2 of 4
1
I think this obeys your rules and prints the set in descending order:
s = {1, 2, 3}
for _ in range(len(s)):
elem = max(s)
s.remove(elem)
print(elem, end=',' if s else '')
# 3,2,1
GeeksforGeeks
geeksforgeeks.org › python-reversed-function
Python reversed() Method - GeeksforGeeks
March 8, 2025 - reversed() function in Python lets us go through a sequence like a list, tuple or string in reverse order without making a new copy. Instead of storing the reversed sequence, it gives us an iterator that yields elements one by one, saving memory.
Programiz
programiz.com › python-programming › methods › built-in › reversed
Python reversed()
country_capitals = { 'England': 'London', 'Canada': 'Ottawa', 'Germany': 'Berlin' } # access keys in reversed order # and convert it to a tuple country = tuple(reversed(country_capitals)) print(country)
Top answer 1 of 4
3
You could use list slice assignment, which modifies the list in-place:
>>> L = [1, 5, 4, 3, 2, 6]
>>> L[1:5] = L[4:0:-1]
>>> L
[1, 2, 3, 4, 5, 6]
2 of 4
3
You can reassign the slice of the list to that same slice in reverse
l = [1,5,4,3,2,6]
l[1:5] = l[1:5][::-1]
print(l)
#[1, 2, 3, 4, 5, 6]
ZetCode
zetcode.com › python › reverse
Python reverse - reversing Python sequences
When we reverse items, we change their order. Note that reversing should not be confused with sorting in descending order. A Python list has a reverse function. The [::-1] slice operation to reverse a Python sequence. The reversed built-in function returns a reverse iterator.
Codecademy
codecademy.com › article › how-to-reverse-a-list-in-python
How to Reverse a List in Python | Codecademy
To enhance your understanding of Python concepts and dive into more advanced topics, check out the Learn Intermediate Python 3 course from Codecademy. Yes! You can use slicing ([::-1]), reversed(), a for loop, or recursion to reverse a list without using .reverse().
dbader.org
dbader.org › blog › python-reverse-list
How to Reverse a List in Python – dbader.org
July 11, 2017 - A step-by-step tutorial on the three main ways to reverse a Python list or array: in-place reversal, list slicing, and reverse iteration.
W3Schools
w3schools.com › python › ref_list_reverse.asp
Python List reverse() Method
The reverse() method reverses the sorting order of the elements. ... The built-in function reversed() returns a reversed iterator object. ... If you want to use W3Schools services as an educational institution, team or enterprise, send us an ...
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 - Benefit from an open cloud ecosystem with seamless API & integrations and a Python library. ... To reverse a list in Python, two basic methods are commonly used, the built-in reverse() method and slicing with [::-1].
GeeksforGeeks
geeksforgeeks.org › python › python-reversing-list
Reversing a List in Python - GeeksforGeeks
Let's see different methods to reverse a list. reverse() method reverses the elements of the list in-place and it modifies the original list without creating a new list. ... This method builds a reversed version of the list using slicing with ...
Published May 29, 2026
Upgrad
upgrad.com › home › tutorials › software & tech › how to reverse a list in python?
Reversing a List in Python - upGrad
November 11, 2024 - NumPy arrays are versatile data structures that are especially useful for numerical data, but they can also handle other data types. Apply NumPy's flip() function to the NumPy array. The flip() function reverses the elements along the specified ...
W3Schools
w3schools.com › python › ref_func_reversed.asp
Python reversed() Function
Python Overview Python Built-in ... Python Set Methods Python File Methods Python Keywords Python Exceptions Python Glossary · Built-in Modules Random Module Requests Module Statistics Module Math Module cMath Module · Remove List Duplicates Reverse a String Add Two ...
Real Python
realpython.com › python-reverse-list
Reverse Python Lists: Beyond .reverse() and reversed() – Real Python
June 28, 2023 - To meet the first challenge, you can use either .reverse() or a loop that swaps items by index. For the second, you can use reversed() or a slicing operation. In the next sections, you’ll learn about different ways to accomplish both in your code. ... Like other mutable sequence types, Python lists implement .reverse().
Note.nkmk.me
note.nkmk.me › home › python
Reverse a List, String, Tuple in Python: reverse, reversed | note.nkmk.me
August 16, 2023 - In Python, you can reverse a list using the reverse() method, the built-in reversed() function, or slicing. To reverse a string (str) and a tuple, use reversed() or slicing. Reverse a list using the r ...
DataCamp
datacamp.com › tutorial › python-reverse-list
Python Reverse List: How to Reorder Your Data | DataCamp
February 27, 2025 - If you're starting your Python ... concepts like list handling and data structures. The easiest way to reverse a list in Python is using slicing ([::-1]), which creates a new reversed list without modifying the original:...
Career Karma
careerkarma.com › blog › python › python reverse list: a step-by-step tutorial
Python Reverse List: A Step-by-Step Tutorial | Career Karma
December 1, 2023 - These methods will reverse the list without creating a new list. Python reverse() and reversed() will reverse the elements in the original list object. Reversing a list is a common part of any programming language.
W3Schools
w3schools.com › python › python_howto_reverse_string.asp
How to reverse a String in Python
Python Examples Python Compiler Python Exercises Python Quiz Python Challenges Python Practice Problems Python Server Python Syllabus Python Study Plan Python Interview Q&A Python Bootcamp Python Training ... Learn how to reverse a String in Python.
Python documentation
docs.python.org › 3 › tutorial › datastructures.html
5. Data Structures — Python 3.14.6 documentation
To loop over a sequence in reverse, first specify the sequence in a forward direction and then call the reversed() function.
Top answer 1 of 2
3
The function you're looking for is list comprehensions. These are useful in that you don't have to iterate over a sequence, which is what range and xrange (in 2.x) provide.
str can be iterated over and sliced, much like strings. The only difference is that str elements are immutable.
To your example, say you have a set of strings and you want to iterate over them. No problem - just remember that sets have no inherent ordering to them; they only guarantee that the contents are unique.
myset = set(["first", "second", "third", "fourth", "fifth"])
for i in myset:
print i
...which prints:
second
fifth
fourth
third
first
It's also the case that you can reverse a single string by itself using the step parameter for a sequence type, of which str belongs. You can do that with this:
"this is the song that never ends"[::-1]
...which prints:
'sdne reven taht gnos eht si siht'
2 of 2
1
try this:
>>> str = 'abcdefghijklmnopqrstuvwxyz'
>>> str[::-1]
'zyxwvutsrqponmlkjihgfedcba'
Ashok IT
ashokit.in › blog › how-to-reverse-a-list-in-python-learn-python-list-reverse-method
How to Reverse a List in Python – Learn reverse() Method with Examples | Ashok IT Blogs
February 24, 2026 - You can reverse a list in Python using the built-in reverse() method, which modifies the original list in place. Alternatively, you can use list slicing ([::-1]) or the reversed() function to create a new reversed list without changing the original ...