Scan candidate (overseas) proxies from http://free-proxy-list.net

def scan_free_proxy_list(self):
        """Scan candidate (overseas) proxies from http://free-proxy-list.net"""
        self.logger.info('start scanning http://free-proxy-list.net '
                         'for proxy list...')
        response = requests.get('http://free-proxy-list.net')
        soup = BeautifulSoup(response.content, 'lxml')
        table = soup.find('table', id='proxylisttable')
        for tr in table.tbody.find_all('tr'):
            info = tr.find_all('td')
            if info[4].string != 'elite proxy':
                continue
            if info[6].string == 'yes':
                protocol = 'https'
            else:
                protocol = 'http'
            addr = '{}:{}'.format(info[0].string, info[1].string)
            self.proxy_queue.put({'addr': addr, 'protocol': protocol})