Python Set intersection_update() Method

Example

Remove the items that is not present in both x and y:

x = {"apple", "banana", "cherry"}
y = {"google", "microsoft", "apple"}

x.intersection_update(y)

print(x)

Definition and Usage

The intersection_update() method removes the items that is not present in both sets (or in all sets if the comparison is done between more than two sets).

The intersection_update() method is different from the intersection() method, because the intersection() method returns a new set, without the unwanted items, and the intersection_update() method removes the unwanted items from the original set.

Syntax

set.intersection_update(set1, set2 ... etc)

Parameter Values

Parameter	Description
set1	Required. The set to search for equal items in
set2	Optional. The other set to search for equal items in. You can compare as many sets you like. Separate the sets with a comma

More Examples

Example

Compare 3 sets, and return a set with items that is present in all 3 sets:

x = {"a", "b", "c"}
y = {"c", "d", "e"}
z = {"f", "g", "c"}

x.intersection_update(y, z)

print(x)

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❮ Set Methods