Python 3 reference · Set Methods

Python Set intersection() Method

Return a new set with the elements common to this set and all others. The same as a & b.

Syntax

set.intersection(*others)

Parameter	Description
`*others`	One or more iterables.

A new set.

Common elementsTry it yourself

python = {"Ada", "Bob", "Cy"}
java = {"Bob", "Dee"}
print(python.intersection(java), python & java)

Output

{'Bob'} {'Bob'}

Several sets at onceTry it yourself

a, b, c = {1, 2, 3}, {2, 3, 4}, {3, 4, 5}
print(a.intersection(b, c))

Output

{3}

Version	Change
Python 3.0	Added

set.intersection_update() · Keep only the elements found in this set and all others, in place. The same as a &= b.
set.union() · Return a new set with all elements from this set and the others. The same as a | b.
set.isdisjoint() · Return True if the set has no elements in common with another iterable.
Python Sets · tutorial