Python list | reverse()

reverse() is an inbuilt method in Python programming language that reverses objects of list in place.

Syntax: 

list_name.reverse()

Parameters:



There are no parameters

Returns: 

The reverse() method does not return any value but 
reverse the given object from the list.

Code#1:

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# Python3 program to demonstrate the 
# use of reverse method 
   
# a list of numbers
list1 = [1, 2, 3, 4, 1, 2, 6] 
list1.reverse() 
print(list1) 
  
# a list of characters
list2 = ['a', 'b', 'c', 'd', 'a', 'a'] 
list2.reverse() 
print(list2) 

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Output:


[6, 2, 1, 4, 3, 2, 1]
['a', 'a', 'd', 'c', 'b', 'a']



Error: 


When anything other than list is used in place of list, 
then it returns an AttributeError


Code#2: 











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# Python3 program to demonstrate the  


# error in reverse() method 


   


# error when string is used in place of list 


string = "abgedge" 


string.reverse()  


print(string) 



















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Output:


Traceback (most recent call last):
  File "/home/b3cf360e62d8812babb5549c3a4d3d30.py", line 5, in 
    string.reverse() 
AttributeError: 'str' object has no attribute 'reverse' 



Practical Application: 

Given a list of numbers, check if the list is palindrome.

Note: palindrome-sequence that reads the same backwards as forwards 


Code#3:











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# Python3 program for the  


# practical application of reverse()  


  


list1 = [1, 2, 3, 2, 1] 


  


# store a copy of list 


list2 = list1.copy()   


  


# reverse the list 


list2.reverse()  


  


# compare reversed and original list  


if list1 == list2: 


    print("Palindrome")  


else: 


    print("Not Palindrome")  



















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Output:


Palindrome




          
          
          
          

            

    

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