Python语言学习：集合运算
常见的集合运行，交集，并集，补集
先看看需求
Input :
A = {0, 2, 4, 6, 8}
B = {1, 2, 3, 4, 5}
Output :
Union : [0, 1, 2, 3, 4, 5, 6, 8]
Intersection : [2, 4]
Difference : [8, 0, 6]
Symmetric difference : [0, 1, 3, 5, 6, 8]
在python里已经有的实现
| for union.
& for intersection.
– for difference
^ for symmetric difference(A|B - A&B)
# Program to perform different set operations
# as we do in mathematics
# sets are define
A = {0, 2, 4, 6, 8};
B = {1, 2, 3, 4, 5};
# union
print("Union :", A | B)
# intersection
print("Intersection :", A & B)
# difference
print("Difference :", A - B)
# symmetric difference
print("Symmetric difference :", A ^ B)
输出结果如下
('Union :', set([0, 1, 2, 3, 4, 5, 6, 8]))
('Intersection :', set([2, 4]))
('Difference :', set([8, 0, 6]))
('Symmetric difference :', set([0, 1, 3, 5, 6, 8]))
参考