Python自动化开发-数据类型之列表

Python 数据类型-列表

列表是Python重要的数据类型之一。接下来主要介绍列表类型的常用操作。

1.创建列表

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#创建列表
lis01=[11,"ruby",(1,2,"haha",)]
print(type(lis01))
print(lis01)

代码运行结果：

<class 'list'>
[11, 'ruby', (1, 2, 'haha')]

2.列表-切片

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#列表:切片
lis01=[11,"ruby",(1,2,"haha",),"258","lily"]
r=lis01[1:3]
print(type(lis01))
print(r)

代码运行结果：

<class 'list'>
['ruby', (1, 2, 'haha')]

3.列表-索引

根据元素查找列表中的元素索引位置。

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#列表:索引
lis01=[11,"ruby",(1,2,"haha",),"258","lily"]
r=lis01.index("258")
print(r)

代码运行结果：3

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#列表:索引
lis01=[11,"ruby",(1,2,"haha",),"258","lily"]
r=lis01.index(11)
print(r)

代码运行结果：0

 4.列表-追加

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#列表:追加
lis01=[11,"ruby",(1,2,"haha",),"258","lily"]
lis01.append("asdf")
lis01.append(99)
print(lis01)

代码运行结果：

[11, 'ruby', (1, 2, 'haha'), '258', 'lily', 'asdf', 99]

5.列表-随机删除

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#列表:随机删除
lis01=[11,"ruby",(1,2,"haha",),"258","lily"]
lis01.pop()
print(lis01)

代码运行结果：

[11, 'ruby', (1, 2, 'haha'), '258']

6.列表-指定删除

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#列表:删除指定字符串元素258,删除数字字符元素11.
lis01=[11,"ruby",(1,2,"haha",),"258","lily"]
lis01.remove(11)
lis01.remove("258")
print(lis01)

代码运行结果：

['ruby', (1, 2, 'haha'), 'lily']

7.列表-计算长度

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#列表:计算列表长度，即计算列表元素的个数，就是计算列表有多少个元素值。
lis01=[11,"ruby",(1,2,"haha",),"258","lily",123]
r=lis01.__len__()
print(r)

代码运行结果：6 

8.列表-循环

循环即可迭代

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#列表:循环，即可迭代
lis01=[11,"ruby",(1,2,"haha",),"258","lily",123]
for i in lis01:
    print(i)

代码运行结果：

11
ruby
(1, 2, 'haha')
258
lily
123

9.列表-包含

包含：判断列表里是否包含某个元素值，True/False。

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#列表:包含，判断列表中是否包含某个元素值
lis01=[11,"ruby",(1,2,"haha",),"258","lily",123]
r=lis01.__contains__(11)
s=lis01.__contains__(12)
print(r)
print(s)

代码运行结果：

True
False 

10.列表-count

count:计算列表中的某个元素出现的次数。

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#列表:count,计算字符串元素"258"出现了几次
lis01=[11,"ruby",(1,2,"haha",),"258","lily",123,"ruby",11,11,"258",258]
r=lis01.count("258")
print(r)

代码运行结果：2

11.列表-extend

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#列表:extend
lis01=[11,"ruby",(1,2,"haha",),"258","lily",123,"ruby",11,11,"258",258]
print(lis01)
lis01.extend("999")
print(lis01)
lis01.extend("1")
print(lis01)
lis01.extend([11,"wsd","11",(11,22,"sdf","333",[1,2,3])])
print(lis01)
lis01.extend((11,"22","edf",[1,99],))
print(lis01)

代码运行结果：

[11, 'ruby', (1, 2, 'haha'), '258', 'lily', 123, 'ruby', 11, 11, '258', 258]
[11, 'ruby', (1, 2, 'haha'), '258', 'lily', 123, 'ruby', 11, 11, '258', 258, '9', '9', '9']
[11, 'ruby', (1, 2, 'haha'), '258', 'lily', 123, 'ruby', 11, 11, '258', 258, '9', '9', '9', '1']
[11, 'ruby', (1, 2, 'haha'), '258', 'lily', 123, 'ruby', 11, 11, '258', 258, '9', '9', '9', '1', 11, 'wsd', '11', (11, 22, 'sdf', '333', [1, 2, 3])]
[11, 'ruby', (1, 2, 'haha'), '258', 'lily', 123, 'ruby', 11, 11, '258', 258, '9', '9', '9', '1', 11, 'wsd', '11', (11, 22, 'sdf', '333', [1, 2, 3]), 11, '22', 'edf', [1, 99]]

12.列表-insert

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#列表:insert,在索引为1的元素即字符串元素ruby(居左优先)前面插入新元素999
lis01=[11,"ruby",(1,2,"haha",),"258","lily",123,"ruby",11,11,"258",258]
print(lis01)
lis01.insert(1,999)
print(lis01)

代码运行结果：

[11, 'ruby', (1, 2, 'haha'), '258', 'lily', 123, 'ruby', 11, 11, '258', 258]
[11, 999, 'ruby', (1, 2, 'haha'), '258', 'lily', 123, 'ruby', 11, 11, '258', 258]

13.列表-reverse

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#列表:reverse,翻转
lis01=[1,2,9,4,3]
print(lis01)
lis01.reverse()
print(lis01)

代码运行结果：

[1, 2, 9, 4, 3]
[3, 4, 9, 2, 1]

14.列表-sort

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#列表:sort,升序
lis01=[1,2,9,4,3]
print(lis01)
lis01.sort()
print(lis01)

代码运行结果：

[1, 2, 9, 4, 3]
[1, 2, 3, 4, 9]