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List Methods in Python | Set 2 (del, remove(), sort(), insert(), pop(), extend()…)

Last Updated : 18 Sep, 2018
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Some of the list methods are mentioned in set 1 below

List Methods in Python | Set 1 (in, not in, len(), min(), max()…)

More methods are discussed in this article.

1. del[a : b] :- This method deletes all the elements in range starting from index ‘a’ till ‘b’ mentioned in arguments.

2. pop() :- This method deletes the element at the position mentioned in its arguments.




# Python code to demonstrate the working of
# del and pop()
  
# initializing list 
lis = [2, 1, 3, 5, 4, 3, 8]
  
# using del to delete elements from pos. 2 to 5
# deletes 3,5,4
del lis[2 : 5]
  
# displaying list after deleting 
print ("List elements after deleting are : ",end="")
for i in range(0, len(lis)):
    print(lis[i], end=" ")
      
print("\r")
  
# using pop() to delete element at pos 2
# deletes 3
lis.pop(2)
  
# displaying list after popping  
print ("List elements after popping are : ", end="")
for i in range(0, len(lis)):
    print(lis[i], end=" ") 






                        








Output:


List elements after deleting are : 2 1 3 8 
List elements after popping are : 2 1 8 





3. insert(a, x) :- This function inserts an element at the position mentioned in its arguments. It takes 2 arguments, position and element to be added at respective position.


4. remove() :- This function is used to delete the first occurrence of number mentioned in its arguments.











                                    




                                    

                                    




                                    




                                    

                                    

                                    
                                




















# Python code to demonstrate the working of 


# insert() and remove() 


  


# initializing list  


lis = [2, 1, 3, 5, 3, 8] 


  


# using insert() to insert 4 at 3rd pos 


lis.insert(3, 4) 


  


# displaying list after inserting 


print("List elements after inserting 4 are : ", end="") 


for i in range(0, len(lis)): 


    print(lis[i], end=" ") 


      


print("\r") 


  


# using remove() to remove first occurrence of 3 


# removes 3 at pos 2 


lis.remove(3) 


  


# displaying list after removing  


print ("List elements after removing are : ", end="") 


for i in range(0, len(lis)): 


    print(lis[i], end=" ") 



















                        







                        








Output:


List elements after inserting 4 are : 2 1 3 4 5 3 8 
List elements after removing are : 2 1 4 5 3 8 





5. sort() :- This function sorts the list in increasing order.


6. reverse() :- This function reverses the elements of list.











                                    




                                    

                                    




                                    




                                    

                                    

                                    
                                




















# Python code to demonstrate the working of 


# sort() and reverse() 


  


# initializing list  


lis = [2, 1, 3, 5, 3, 8] 


  


# using sort() to sort the list 


lis.sort() 


  


# displaying list after sorting 


print ("List elements after sorting are : ", end="") 


for i in range(0, len(lis)): 


    print(lis[i], end=" ") 


      


print("\r") 


  


# using reverse() to reverse the list 


lis.reverse() 


  


# displaying list after reversing 


print ("List elements after reversing are : ", end="") 


for i in range(0, len(lis)): 


    print(lis[i], end=" ") 



















                        







                        








Output:


List elements after sorting are : 1 2 3 3 5 8 
List elements after reversing are : 8 5 3 3 2 1 





7. extend(b) :- This function is used to extend the list with the elements present in another list. This function takes another list as its argument.


8. clear() :- This function is used to erase all the elements of list. After this operation, list becomes empty.











                                    




                                    

                                    




                                    




                                    

                                    

                                    
                                




















# Python code to demonstrate the working of 


# extend() and clear() 


  


# initializing list 1 


lis1 = [2, 1, 3, 5] 


  


# initializing list 1 


lis2 = [6, 4, 3] 


  


# using extend() to add elements of lis2 in lis1 


lis1.extend(lis2) 


  


# displaying list after sorting 


print ("List elements after extending are : ", end="") 


for i in range(0, len(lis1)): 


    print(lis1[i], end=" ") 


      


print ("\r") 


  


# using clear() to delete all lis1 contents 


lis1.clear() 


  


# displaying list after clearing 


print ("List elements after clearing are : ", end="") 


for i in range(0, len(lis1)): 


    print(lis1[i], end=" ") 



















                        







                        








Output:


List elements after extending are : 2 1 3 5 6 4 3 
List elements after clearing are : 



Related articles:

List methods in Python

List Methods in Python | Set 1 (in, not in, len(), min(), max()…)









                                    


                                                                          

                                        












                                      

                                                                        

                                        

                                            

                                                

                                                    
M
                                                

                                                

                                                    



    Manjeet Singh



                                                

                                            

                                                                                    

                                        

                                            
    

        
        
    
                                            

                                                
                                                
                                            

                                            

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