MODIFICATION/UPDATE

CHANGING ELEMENT

months = ["Jan", "Feb", "Dec", "Apr"]
months[2] = "Mar"
print(months)

CLEARING LIST

#!/usr/bin/env python3

def main() -> None:
    
    numberList = [10,20,30,40,50,60];
    print("List Length: ", len(numberList));
    
    #clear list
    numberList = [];
    print("List Length: ", len(numberList))

if __name__ == "__main__":
    main();

LIST UPDATE FUNCTIONS

These are the four major functions that can be used to update any given list and its items.

• append() This function helps in adding a new item at the end of the list.

• insert() This function helps in adding a new item at a specific position in the list. You can exactly specify which position you want to add the new item.

• remove() This is used to remove the first matching element from a list. You can exactly specify which item you want to remove from the list.

• pop() This is used to remove the element at the specified position.

#!/usr/bin/env python3

def main() -> None:

    fruits = ["apple", "banana", "cherry"]
    
    //display updated list
    fruits.append("orange");
    print(fruits);
    
    //remove the last element "orange"
    fruits.pop(3)
    print(fruits);
    
    //insert item "orange" into 2nd position
    fruits.insert(1, "orange");
    print(fruits);
    
    //remove the first encountered specified element
    fruits.remove(orange);

if __name__ == "__main__":
    main();
    
 * OUTPUT
    ['apple', 'banana', 'cherry', 'orange']
    ['apple', 'banana', 'cherry']
    ['apple', 'orange', 'banana', 'cherry']
    ['apple', 'banana', 'cherry']

INSERT

colors = ['red', 'green', 'blue']
input1 = int(input())
input2 = input()

colors.insert(input1, input2)
print(colors)

 * INPUT
    0
    black
	
 * OUTPUT
    ['black', 'red', 'green', 'blue']