code: def write(self, output):
          
          w = c_int32()
          # print "output max", max(abs(output))
          self.WriteAnalogF64(self.bufsize, 0, 10.0, DAQmx_Val_GroupByChannel,
                              output, w, None);
docs: Writes the data to be output to the device buffer, output will be looped when the data runs out
  
          :param output: data to output
          :type output: numpy.ndarray