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Python集合上的运算符和方法有什么区别？

2024-05-13 18:41:05 401

Python的set对象表示内置set类。可以通过调用相应的方法或使用运算符来执行诸如并集，交集，差和对称差之类的不同集合操作。

方法结合

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

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

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

>>> s1={1,2,3,4,5}
>>> s2={4,5,6,7,8}
>>> s1&s2
{4, 5}
>>> s2&s1
 {4, 5}

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

>>> s1={1,2,3,4,5}
>>> s2={4,5,6,7,8}
>>> s1-s2
{1, 2, 3}
>>> s2-s1
 {8, 6, 7}