FilesExpand file tree

 master

/

test_set.py

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

46 lines (33 loc) · 1.01 KB

 master

/

test_set.py

Copy path

Top

File metadata and controls

• Code
• Blame

46 lines (33 loc) · 1.01 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

#!/usr/bin/env python

# -*- coding: UTF-8 -*-

# python的set和其他语言类似, 是一个无序不重复元素集, 基本功能包括关系测试和消除重复元素.

# 集合对象还支持union(联合), intersection(交), difference(差)和sysmmetric difference(对称差集)等数学运算.

# sets 支持 x in set, len(set)和 for x in set. 作为一个无序的集合, sets不记录元素位置或者插入点.

# 因此, sets不支持 indexing, slicing, 或其它类序列(sequence-like)的操作.

# http://blog.csdn.net/business122/article/details/7541486

x = set('spam')

y = set(['h', 'a', 'm'])

print(x, y)

# 交集

print(x & y)

# 并集

print(x | y)

# 差集, 项在t中, 但不在s中

print(x - y)

# 对称差集, 项在t或s中, 但不会同时出现在二者中

print(x ^ y)

# 添加一项

x.add('x')

print(x)

# 添加多项

x.update(['a', 'b', 'c'])

print(x)

# 删除一项

x.remove('s')

print(x)

# 去重, 不用hash方法

a = [11, 22, 33, 44, 11, 22]

b = set(a)

print(b)

c = [i for i in b]

print(c)