#List of common user agents
user_agent = [
'Windows 10/ Edge browser: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) '
'Chrome/42.0.2311.135 Safari/537.36 Edge/12.246',
'Windows 7/ Chrome browser: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) '
'Chrome/47.0.2526.111 Safari/537.36',
'Mac OS X10/Safari browser: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_2) AppleWebKit/601.3.9 (KHTML, '
'like Gecko) Version/9.0.2 Safari/601.3.9',
'Linux PC/Firefox browser: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:15.0) Gecko/20100101 Firefox/15.0.1',
'Chrome OS/Chrome browser: Mozilla/5.0 (X11; CrOS x86_64 8172.45.0) AppleWebKit/537.36 (KHTML, like Gecko) '
'Chrome/51.0.2704.64 Safari/537.36']