code: def _check_acl(self, acl_no, network, netmask):
          
          exp_cfg_lines = ['ip access-list standard ' + str(acl_no),
                           ' permit ' + str(network) + ' ' + str(netmask)]
          ios_cfg = self._get_running_config()
          parse = HTParser(ios_cfg)
          acls_raw = parse.find_children(exp_cfg_lines[0])
          if acls_raw:
              if exp_cfg_lines[1] in acls_raw:
                  return True
              LOG.error("Mismatch in ACL configuration for %s", acl_no)
              return False
          LOG.debug("%s is not present in config", acl_no)
          return False
docs: Check a ACL config exists in the running config.
  
          :param acl_no: access control list (ACL) number
          :param network: network which this ACL permits
          :param netmask: netmask of the network
          :return: