Python - join two sets

In this article, we would like to show you how to join two sets in Python.

1. Using union() method

In this example, we use union() method to create a new set with all items from the two existing sets.

my_set1 = {'A', 'B'}
my_set2 = {'C', 'D'}

my_set3 = my_set1.union(my_set2)

print(my_set3)  # {'C', 'A', 'B', 'D'}

Output:

{'C', 'A', 'B', 'D'}

2. Using update() method

In this example, we use update() method to add the items from my_set2 to my_set1.

my_set1 = {'A', 'B'}
my_set2 = {'C', 'D'}

my_set1.update(my_set2)

print(my_set1)  # {'B', 'A', 'D', 'C'}

Output:

{'B', 'A', 'D', 'C'}

Note:

Both presented methods exclude duplicate elements.