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