code: def list(self, community=None, hostfilter=None, host=None):
          
          return self.send.snmp_list(community, hostfilter, host)
docs: Returns a list of SNMP information for a community, hostfilter or host
          :param snmpstring: A specific SNMP string to list
          :param hostfilter: Valid hostfilter or None
          :param host: t_hosts.id or t_hosts.f_ipaddr
          :return: [ [ record_id, ipaddr, hostname, community, access, version ] ... ]