本文教程操作环境：windows7系统、Python 3.9.1，DELL G3电脑。
以属于A且属于B的元素为元素的集合成为A与B的交集。
1、概念
交集就是求两个集合共有的元素。
my_set1 = {"apple", "orange", "pear", "banana", "food"}
my_set2 = {"apple", "orange", "pear"}
both = my_set1 & my_set2
print(both)2、实例
除了通过 & 符号以外，还可以通过集合的 intersection 方法完成。
my_set1 = {"apple", "orange", "pear", "banana", "food"}
my_set2 = {"apple", "orange", "pear"}
both = my_set1.intersection(my_set2)
print(both)
