Python自动化开发数据类型之集合

Python 数据类型-集合

集合也是Python数据类型之一。接下来主要介绍集合类型的操作。

1.创建集合

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#创建集合
jh0101={11,22,"lucy",(1,"sdf")}
print(jh0101)
print(type(jh0101))

代码运行结果：

{11, 'lucy', (1, 'sdf'), 22}
<class 'set'>

2.求交集

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#求交集
jh01={22,333,"asdf",("dsdf","12we",11)}
jh02={22,"asdf",("dsdf","12we",11)}
jiaoji=jh02.intersection(jh01)
print(jiaoji)

代码运行结果：

{'asdf', ('dsdf', '12we', 11), 22}

3.列表转换为集合

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#列表转换为集合
jh01 = set(["qwe", 123])
print(jh01)
print(type(jh01))

代码运行结果：

{123, 'qwe'}
<class 'set'>

4.求并集

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#求并集
jh01={11,22,333}
jh02={333,13,22}
bj=jh01.union(jh02)
print(bj)

代码运行结果：

{13, 22, 11, 333}

 5.求差集

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#求差集
jh01={11,22,333}
jh02={333,13,22}
cj01=jh02.difference(jh01)
print(cj01)
cj02=jh01.difference(jh02)
print(cj02)

代码运行结果：

{13}
{11}

6.求交叉补集

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#求交叉补集
jh01={11,22,333}
jh02={333,13,22}
jcbj01=jh01.symmetric_difference(jh02)
print(jcbj01)
jcbj02=jh02.symmetric_difference(jh01)
print(jcbj02)

代码运行结果：

{11, 13}
{11, 13}

7.向集合中添加元素/浅复制/随机删除集合中的某个元素/清空集合

#!/usr/bin/env python
# -*- coding:utf-8 -*-
jh01={11,22,"dfre",(22,"dfgh","g",)}
print(jh01)
jh01.add("mb1222")
print(jh01)
qiancopy=jh01.copy()
print(qiancopy)
suijishan=jh01.pop()
print(jh01)
jh01.clear()
print(jh01)

代码运行结果：

{'dfre', 11, (22, 'dfgh', 'g'), 22}
{'dfre', 11, 'mb1222', (22, 'dfgh', 'g'), 22}
{'dfre', 11, 'mb1222', (22, 'dfgh', 'g'), 22}
{11, 'mb1222', (22, 'dfgh', 'g'), 22}
set()

8.删除集合指定元素，被删除的元素不存在会报错

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#指定删除集合中某个元素,被删除的元素不存在会报错
jh01={11,22,333,"hello",(11,22,333,)}
jh01.remove("hellodddd")
print(jh01)

代码运行结果：

C:\Users\Administrator\PycharmProjects\python_s3\venv\Scripts\python.exe C:/Users/Administrator/PycharmProjects/python_s3/day10/s02.py
Traceback (most recent call last):
File "C:/Users/Administrator/PycharmProjects/python_s3/day10/s02.py", line 6, in <module>
jh01.remove("hellodddd")
KeyError: 'hellodddd'

9.删除集合指定元素，被删除的元素不存在不会报错

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#指定删除集合中某个元素,被删除的元素不存在不会报错
jh01={11,22,333,"hello",(11,22,333,)}
jh01.discard(222)
print(jh01)

代码运行结果：

{11, 'hello', 333, 22, (11, 22, 333)}