Python List extend() Method

The Python’s List extend() method iterates over an iterable like string, list, tuple, etc., and adds each element of the iterable to the end of the Python List, modifying the original list.

Python List extend() Syntax

Syntax: list.extend(iterable)

Parameters:

• iterable: Any iterable (list, set, tuple, etc.)

Returns: None

Python List extend() Example

The list.extend() method is equivalent to list[len(list):] = iterable. The list.extend() is Python’s built-in function that It loops through the provided iterable, appending the elements to the end of the current list.

Python3

l = [1, 2, 3]
l.extend([4, 5, 6])
print(l)

Output:

[1, 2, 3, 4, 5, 6]

 List extend() Method with a Tuple

Use extend() in Python to add elements from Tuple to List.

Python3

# My List
my_list = ['geeks', 'for', 'geeks']

# My Tuple
my_tuple = ('DSA', 'Java')

# Append tuple to the list
my_list.extend(my_tuple)

print(my_list)

Output:

['geeks', 'for', 'geeks', 'DSA', 'Java']

List extend() Method with a Set

Use extend() in Python to add elements from Set to List.

Python3

# My List
my_list = ['geeks', 'for', 'geeks']

# My Set
my_set = {'Flutter', 'Android'}

# Append set to the list
my_list.extend(my_set)

print(my_list)

Output:

['geeks', 'for', 'geeks', 'Flutter', 'Android']

Extend String to the List

A string is iterable, so if you extend a list with a string, you’ll append each character as you iterate over the string.

Python3

# My list
my_list = ['geeks', 'for', 6, 0, 4, 1]

# My string
my_list.extend('geeks')

print(my_list)

Output:

['geeks', 'for', 6, 0, 4, 1, 'g', 'e', 'e', 'k', 's']