Python - join two sets

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

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

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my_set1 = {'A', 'B'}

my_set2 = {'C', 'D'}

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my_set3 = my_set1.union(my_set2)

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

Output:

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

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

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my_set1 = {'A', 'B'}

my_set2 = {'C', 'D'}

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my_set1.update(my_set2)

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

Output:

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

Note:

Both presented methods exclude duplicate elements.