<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def do_sess_get(self, url):
 """get url by requests synchronized :param url: :type url: :return: :rtype: """

        try:
            res = self.sess.get(url, headers=self.headers['get'], timeout=self.timeout)
            if res.status_code == 200:
                return res.content
        except (requests.ReadTimeout, requests.ConnectTimeout, requests.ConnectionError) as _:
            zlog.error('failed of: {} with error: {}'.format(url, _))