집합자료형

집합이 다음과 같이 주어졌다고 해보자.

>>> s1 = set([1, 2, 3, 4, 5, 6])
>>> s2 = set([4, 5, 6, 7, 8, 9])

차집합

>>> s1.difference(s2)
{1, 2, 3}
>>> s2.difference(s1)
{8, 9, 7}

>>> s1 - s2
{1, 2, 3}
>>> s2 - s1
{8, 9, 7}

교집합

>>> s1.intersection(s2)
{4, 5, 6}

>>> s1 & s2
{4, 5, 6}

합집합

>>> s1.union(s2)
{1, 2, 3, 4, 5, 6, 7, 8, 9}

>>> s1 | s2
{1, 2, 3, 4, 5, 6, 7, 8, 9}