user_agents 模块 parse，对浏览器信息处理模块，获取版本号等信息

 1 from user_agents import parse
 2 
 3 uastr = "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.221 Safari/537.36 SE 2.X MetaSr 1.0"
 4 
 5 ua = parse(uastr)
 6 print(ua, type(ua))
 7 print(ua.browser)
 8 print(ua.browser.version, type(ua.browser.version))
 9 print(ua.browser.version_string, type(ua.browser.version_string))
10 
11 # PC / Windows 8.1 / Sogou Explorer 1.0 <class 'user_agents.parsers.UserAgent'>
12 # Browser(family='Sogou Explorer', version=(1, 0), version_string='1.0')
13 # (1, 0) <class 'tuple'>
14 # 1.0 <class 'str'>