bug fix

import logging

config = None

logging.basicConfig(format="%(asctime)s - %(levelname)s - %(message)s", level=logging.INFO)

logging.basicConfig(format="%(asctime)s - %(levelname)s - %(message)s", level=logging.DEBUG)

def load_config():

            for element in soup_login.find('form').find_all('input'):

                if element.has_attr('value'):

                    info[element['name']] = element['value']

            info['username'] = config['username']

            info['password'] = config['password']

            logging.debug(info)

            logging.info('Login information acquired.')

            url = 'http://cas.sustc.edu.cn{}'.format(action)

            info['username'] = config['username']

            info['password'] = config['password']

            url = 'https://cas.sustc.edu.cn{}'.format(action)

            h = {

                'Host': 'cas.sustc.edu.cn',

                'Connection': 'keep-alive',

                # 'Host': 'cas.sustc.edu.cn',

                # 'Connection': 'keep-alive',

                'Cache-Control': 'max-age=0',

                'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',

                'Origin': 'http://cas.sustc.edu.cn',

                'Upgrade-Insecure-Requests': '1',

                # 'Upgrade-Insecure-Requests': '1',

                'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36',

                'Content-Type': 'application/x-www-form-urlencoded',

                'DNT': '1',

            r = login.post(url, data=info, headers=h, timeout=30)

            logging.info('Login information posted to the CAS server.')

            soup_response = BeautifulSoup(r.content, 'html5lib')

            if soup_response.find('div', id='msg')['class'][0] != 'success':

            success = soup_response.find('div', {'class': 'success'})

            err = soup_response.find('div', {'class': 'errors'})

            if err:

                times_retry_login -= 1

                logging.error('An error occurred.')

                logging.error(err.h2.text)

                logging.error(err.p.text)

                if times_retry_login > 0:  # If keep trying to login too many times, it may trigger security alarm on the CAS server

                    logging.info(

                        'Login FAILED. Try again in ' + str(config['interval_retry_login']) + ' sec. ' + str(

                    sys.exit('Login FAILED')

                sleep(config['interval_retry_login'])

            else:

            elif success:

                logging.info('Login successful')

                times_retry_login = config['max_times_retry_login']

                logging.info('Login attempts reset to ' + str(times_retry_login) + ' .')