code: def get(self, name, handler, request=None):
          
          chan = self._channel(name)
          return _p4p.ClientOperation(chan, handler=unwrapHandler(handler, self._nt),
                                      pvRequest=wrapRequest(request), get=True, put=False)
docs: Begin Fetch of current value of a PV
  
          :param name: A single name string or list of name strings
          :param request: A :py:class:`p4p.Value` or string to qualify this request, or None to use a default.
          :param callable handler: Completion notification.  Called with a Value, RemoteError, or Cancelled
  
          :returns: A object with a method cancel() which may be used to abort the operation.