Python List: insert at index 0

Python List: insert at index 0

To insert an item in a list at index 0, we have two options:

  1. Using the insert() method
  2. Using the + operator

     

Insert at index 0 using the insert() method

insert() is a method that inserts an item in a list at a given position.

insert() Syntax

list.insert(index, item)

insert() accept two required parameters:

  • index: Position to insert the item
  • item: Item value

insert() Example

In the following example, we'll insert the "HTML" value at the index 0 of my_list.

my_list = ["Python", "Django", "Javascript"] # 👉️ List

new_list = my_list.insert(0, "HTML") # 👉️ Insert at index 0

print(my_list) # 👉️ Print

Output:

['HTML', 'Python', 'Django', 'Javascript']

As you can see, the "HTML" has been inserted at index 0.

Insert at index 0 using the + operator

We can also use the + operator to insert at index 0. with the + operator, we can insert one item or more in the front of a list.

+ operator Syntax

[item to insert] + my_list

+ operator Example

In the following example, we'll use the + operator to insert "HTML" at index 0:

my_list = ["Python", "Django", "Javascript"] # 👉️ List

new_list = ["HTML"] + my_list # 👉️ Megre ["HTML"] with my_list

print(new_list) # 👉️ Print

Output:

['HTML', 'Python', 'Django', 'Javascript']

What we did:

  1. Convert the "HTML" string to a list using the list brackets []
  2. Merge two lists using the + operator.

We can also use the + operator to insert multi items at the front of a list. Let's see an example.

my_list = ["Python", "Django", "Javascript"] # 👉️ List

list_to_insert = [1, 2, 3, 4] # 👉️ List to Insert

new_list = list_to_insert + my_list # 👉️ Megre list_to_insert with my_list

print(new_list) # 👉️ Print

Output:

[1, 2, 3, 4, 'Python', 'Django', 'Javascript']

Here, we have inserted multi numbers at the front of my_list. You can visit Append Multiple Items to List in Python for more information about inserting multi items.

Conclusion

This tutorial taught us how to insert an item in a list at index 0. For more tutorials about List, scroll down you will find it.

Happy Coddind </>