extend(): add the items of an iterable to the end of a list in Python

Use the built-in extend() method from list to add all the items of an iterable to the end of a list.

The method doesn’t return any value, it alters the original list.

Lists, sets and tuples are examples of iterables.

In this example, car_brands_list is initialized with two items.

car_brands_list is then extended with the items of the list car_brands_list_two.

After that car_brands_list is extended with the items of the tuple car_brands_tuple.

Finally, car_brands_list is extended with the items of the set car_brands_set.

car_brands_list = ['mclaren', 'ferrari']

car_brands_list_two = ['honda', 'ford']

car_brands_tuple = ('toyota', 'suzuki')

car_brands_set = {'kia', 'bmw'}

print(car_brands_list)

car_brands_list.extend(car_brands_list_two)

print(car_brands_list)

car_brands_list.extend(car_brands_tuple)

print(car_brands_list)

car_brands_list.extend(car_brands_set)

print(car_brands_list)

['mclaren', 'ferrari']

['mclaren', 'ferrari', 'honda', 'ford']

['mclaren', 'ferrari', 'honda', 'ford', 'toyota', 'suzuki']

['mclaren', 'ferrari', 'honda', 'ford', 'toyota', 'suzuki', 'bmw', 'kia']