Python Beginner: List Functions

 Hello, Python developer! 😊

Hope you don't have any difficult on learning creaating, calling and modifying a List.

Today, we will learn the List functions. There are several useful functions for handling items in the List.

I showed list functions with usages.

List Functions 

 - Adding another list at the end of the List: List.extend(Another_List)

 - Appending item in the List: list.append("Creed")

 - Update item in the List: list.insert(update item index, update item)

 - Remove item in the List: list.remove("item")

 - Remove last item in the List: list.pop()

 - Remove all items in the List: list.clear()

 - Show the index number of item in the List: list.index("item"), if the item is not exist in the List, it shows error(ValueError: 'item' is not in list).

 - Count the number of item in the List: list.count("item")

 - Sort items in the List by increasing: list.sort()

 - Reverse sort items in the List by decreasing: list.reverse()

 - Copy list items from another list: list.copy(another list)

I showed all learning exercise codes and execution result as following screen shots.

lucky_numbers = [42, 18, 4, 8, 15, 16, 23]
friends = ["Kevin", "Karen", "Jim", "Jim", "JIM", "Oscar", "Toby"]
friends.extend(lucky_numbers)
friends.append("Creed")
friends.insert(1, "Kelly")
friends.remove("Toby")
lucky_numbers.sort()
print(friends)
friends.clear()
friends.extend(lucky_numbers)
print(friends)

friends = ["Kevin", "Karen", "Jim", "Jim", "JIM", "Oscar", "Toby"]
friends2 = friends.copy()
lucky_numbers.reverse()
friends2.extend(lucky_numbers)
print(friends2)
friends2.pop()
print(friends2)
print(friends2.index("Karen"))
friends2.pop()
print(friends2.count("Jim"))
friends2.clear()

Can you see the same result through Python codes? Congratulations, now you can manipulate items in the List as you want through list functions.

See you on next post, developer!