Python常用小技巧总结-Python Tutorial-php.cn

本文实例总结了Python常用的小技巧。分享给大家供大家参考。具体分析如下：

1. 获取本地mac地址：

import uuid
mac = uuid.uuid1().hex[-12:]
print(mac)

Copy after login

运行结果：e0cb4e077585

2. del 的使用

a = ['b','c','d']
del a[0]
print(a)# 输出 ['c', 'd']

Copy after login

a = ['b','c','d']
del a[0:2] # 删除从第1个元素开始，到第2个元素
print(a)# 输出 ['d']

Copy after login

a = ['b','c','d']
del a
print(a) # 此时a未定义

Copy after login

3. join 的使用

a = ['c','d']
a.reverse()
a = ['d','c']
b = ','.join(a)
print(b) # 输出 d,c

Copy after login

4. 随机数用法：

import random
x = random.randint(1,100)
y = random.choice( 'abcd')
print(x)
print(y)

Copy after login

运行结果为：

68
b

5. dict 的使用：

a=[1,2,3]
b=['a','b','c']
c=dict(zip(a,b))
print(c) # 输出： {1:'a',2:'b',3:'c'}

Copy after login

6. map 的使用：

a='1-2-3-4'
b=map(int,a.split('-'))
print(b) # 输出： [1,2,3,4]

Copy after login

7. [] 使用：

[].remove( value )
[].pop( index ) = value
[].count( x ) = x在列表中数量
{}使用
{}.pop( key ) = value
{}.get( key ) = value or {}.get( key ,0 ) 设默认值

8. 字符串操作

a = str.decode( 'utf-8' )
b = str.encode( 'utf-8' )
str.isdigit() # 是否数值
str1 = 'abc%s'%str2

Copy after login

9. 字符串遍历：

import string
x= string.ascii_lowercase
# print(x) # 输出： abcdefghijklmnopqrstuvwxyz
d = enumerate( x )
c = list( d )
print(c)

Copy after login

输出：

[(0, 'a'), (1, 'b'), (2, 'c'), (3, 'd'), (4, 'e'), (5, 'f'), (6, 'g'), (7, 'h'), (8, 'i'), (9, 'j'), (10, 'k'), (11, 'l'), (12, 'm'), (13, 'n'), (14, 'o'), (15, 'p'), (16, 'q'), (17, 'r'), (18, 's'), (19, 't'), (20, 'u'), (21, 'v'), (22, 'w'), (23, 'x'), (24, 'y'), (25, 'z')]

for i ,j in d:

此时：
i = 0,1,2,.....,25
j = 'a','b'......,'z'

希望本文所述对大家的Python程序设计有所帮助。

Related labels：

python Commonly used Skill

Previous article：Python中Django框架下的staticfiles使用简介 Next article：Python的Django框架中settings文件的部署建议

Statement of this Website

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn