Trusted answers to developer questions
How to use reverse() in Python
Sarah Tanveer
The built-in Python reverse() function is used to reverse the order of objects in a list data structure in place.
Syntax
list.reverse()
Parameters
This function takes no parameters.
Return value
-
This function does not
returnanything. -
The
listthat calls the function is updated in place. -
If the function is called by an object that is not a list, an
Attribute Erroris returned.
Code
# creating a list
listTest1 = [5, 4, 3, 2, 1]
# printing the list
print("list before reversing: ")
print(listTest1)
# call reverse on first list
listTest1.reverse()
print("\nlist after reversing: ")
print(listTest1) # list is updated
# creating another list
listTest2 = ["one", "two", "three", "four", "five"]
# printing second list
print("\nlist before reversing: ")
print(listTest2)
# call reverse on second list
listTest2.reverse()
print("\nlist after reversing: ")
print(listTest2) # list is updated
# this will throw Attribute Error
notAList = 536
# calling reverse with an onject that is not a list
notAList.reverse() reverse() vs. reversed()
The reversed() function takes any sequence as an argument and returns a reversed iterator object. The iterator object accesses the objects of the sequence in reverse order.
On the other hand, reverse() does not take any arguments, nor does it return anything. The changes are made to the original list itself.
RELATED TAGS
python
reverse
communitycreator
CONTRIBUTOR
Sarah Tanveer
RELATED COURSES
View all Courses
Keep Exploring
Related Courses
