code: def poll(self, event, timeout=None):
          
          return self.llc.poll(self._tco, event, timeout)
docs: Wait for a socket event. Posssible *event* values are the strings
          "recv", "send" and "acks". Whent the timeout is present and
          not :const:`None`, it should be a floating point number
          specifying the timeout for the operation in seconds (or
          fractions thereof). For "recv" or "send" the :meth:`poll`
          method returns :const:`True` if a next :meth:`recv` or
          :meth:`send` operation would be non-blocking. The "acks" event
          may only be used with a data-link-connection type socket; the
          call then returns :const:`True` if the counter of received
          acknowledgements was greater than zero and decrements the
          counter by one.