code: def sendmess(self, msgtype, payload, flags=0, size=0, offset=0, timeout=0):
          
  
          # reuse last valid connection or create new
          conn = self.conn or self._new_connection()
          # invalidate last connection
          self.conn = None
  
          flags |= self.flags
          assert (flags & FLG_PERSISTENCE)
          ret, rflags, data = conn.req(
              msgtype, payload, flags, size, offset, timeout)
          if rflags & FLG_PERSISTENCE:
              # persistence granted, save connection object for reuse
              self.conn = conn
          else:
              # discard connection object
              conn.shutdown()
  
          return ret, data
docs: retcode, data = sendmess(msgtype, payload)
          send generic message and returns retcode, data