Python Tutorials · Python Sets

Add Set Items

Learn all about Add Set Items in this comprehensive tutorial.

5 min read beginner

•To add one item to a set use the add() method.
•To add items from another set into the current set, use the update() method.
•The object in the update() method does not have to be a set, it can be any iterable object (tuples, lists, dictionaries etc.

Add Items

Note: Once a set is created, you cannot change its items, but you can add new items.

To add one item to a set use the add() method.

python

thisset = {"apple", "banana", "cherry"}
  thisset.add("orange")print(thisset)

To add items from another set into the current set, use the update() method.

python

thisset = {"apple", "banana", "cherry"}tropical = {"pineapple", "mango", "papaya"}
  thisset.update(tropical)
print(thisset)

The object in the update() method does not have to be a set, it can be any iterable object (tuples, lists, dictionaries etc.).

python

thisset = {"apple", "banana", "cherry"}
  mylist = ["kiwi", "orange"]
  thisset.update(mylist)
print(thisset)

2 questions

Which of the following is true about Add Set Items?

It is strictly typedIt is evaluated at runtimeIt requires explicit memory managementIt is deprecated

What is the most common pitfall when working with Add Set Items?

SyntaxErrorIndentationErrorNameErrorTypeError

Answer all questions to submit.