fake-useragent-文档

使用 fake-useragent 为爬虫提供 UserAgent.

grabs up to date useragent from useragentstring.com
randomize with real world statistic via w3schools.com

https://fake-useragent.herokuapp.com/browsers/0.1.5

1. 安装

$ pip install fake-useragent

2. 使用

from fake_useragent import UserAgent
ua = UserAgent()

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

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

3. update saved database just:

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

Sometimes, useragentstring.com or w3schools.com changes their html, or down, in such case fake-useragent uses hosted cache server heroku.com fallback .
If You don’t want to use hosted cache server (version 0.1.5 added)

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

4. caech Exception

from fake_useragent import FakeUserAgentError

try:
    ua = UserAgent()
except FakeUserAgentError:
    pass

5. if you use a unknown useragent , it will not raise a error, but return “Your favorite Browser”.

import fake_useragent
ua = fake_useragent.UserAgent(fallback='Your favorite Browser')
ua.just_test_agent
'Your favorite Browser'