Python .append() and .extend() Methods
.append() method increases the length of the list by one, so if you want to add only one element to the list, you can use this method.
x = [1, 2, 3] x.append(4) x
[1, 2, 3, 4]
.extend() method increases the length of the list by the number of elements that are provided to the method, so if you want to add multiple elements to the list, you can use this method.
x = [1, 2, 3] x.extend([4, 5]) x
[1, 2, 3, 4, 5]
TRY IT YOURSELF: Access the exercise in our Introduction to Python for Finance course here.
- Add a single element,
'Amazon.com', to the names.
- Add the list
more_elementswhich consists of two elements to
# Append a name to the list names names.____('Amazon.com') print(names) # Extend list names more_elements = ['DowDuPont', 'Alphabet Inc'] names.____(____) print(names)
To learn more about list methods and functions, please see this video from our course Introduction to Python for Finance.