[Python 3] urllib addheaders

import urllib.request

BROWSER_SETTING = [('User-agent', 'Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20100101 Firefox/7.0.1'),
                   ('Accept', 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8'),
                   ('Accept-Language', 'ru-ru,ru;q=0.8,en-us;q=0.5,en;q=0.3'),
                   ('Accept-Encoding', 'gzip, deflate'),
                   ('Accept-Charset', 'windows-1251,utf-8;q=0.7,*;q=0.7'),
                   ('DNT', '1'),
                   ('Connection', 'keep-alive'),
                   ('Cache-Control', 'max-age=0 ')]

opener = urllib.request.build_opener()
opener.addheaders(BROWSER_SETTING)
opener.open('http://yandex.ru').read()

Accept-Language: ru-ru,ru;q=0.8,en-us;q=0.5,en;q=0.3                                                                                       
Accept-Encoding: gzip, deflate                                                                                                             
Dnt: 1                                                                                                                                     
Connection: close                                                                                                                          
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8                                                                    
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20100101 Firefox/7.0.1                                                         
Accept-Charset: windows-1251,utf-8;q=0.7,*;q=0.7                                                                                           
Host: yandex.ru