【爬虫】伪装用户代理——fake-uaseragent

fake-useragent:伪装浏览器身份，多用于反爬虫。
一、安装
打开终端，用pip安装fake-useragent模块。
pip install fake-useragent
二、用法

from fake_useragent import UserAgent
ua = UserAgent()

ua.ie
# Mozilla/5.0 (Windows; U; MSIE 9.0; Windows NT 9.0; en-US);
ua.msie
# Mozilla/5.0 (compatible; MSIE 10.0; Macintosh; Intel Mac OS X 10_7_3; Trident/6.0)'
ua['Internet Explorer']
# Mozilla/5.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; GTB7.4; InfoPath.2; SV1; .NET CLR 3.3.69573; WOW64; en-US)
ua.opera
# Opera/9.80 (X11; Linux i686; U; ru) Presto/2.8.131 Version/11.11
ua.chrome
# Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.2 (KHTML, like Gecko) Chrome/22.0.1216.0 Safari/537.2'
ua.google
# Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_4) AppleWebKit/537.13 (KHTML, like Gecko) Chrome/24.0.1290.1 Safari/537.13
ua['google chrome']
# Mozilla/5.0 (X11; CrOS i686 2268.111.0) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.57 Safari/536.11
ua.firefox
# Mozilla/5.0 (Windows NT 6.2; Win64; x64; rv:16.0.1) Gecko/20121011 Firefox/16.0.1
ua.ff
# Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:15.0) Gecko/20100101 Firefox/15.0.1
ua.safari
# Mozilla/5.0 (iPad; CPU OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A5355d Safari/8536.25

# and the best one, random via real world browser usage statistic
ua.random

三、更新
如果想要更新已经存好的数据库：

from fake_useragent import UserAgent
ua = UserAgent()
ua.update()

如果不想缓存数据库或者没有可以写入的文件系统的话：

from fake_useragent import UserAgent
ua = UserAgent(use_cache_server=False)

更改数据文件的存储位置：

import fake_useragent

# I am STRONGLY!!! recommend to use version suffix
location = '/home/user/fake_useragent%s.json' % fake_useragent.VERSION

ua = fake_useragent.UserAgent(path=location)
ua.random