code: def output_pins(self, pins, write=True):
          
          for pin, value in iter(pins.items()):
              self._output_pin(pin, value)
          if write:
              self.mpsse_write_gpio()
docs: Set multiple pins high or low at once.  Pins should be a dict of pin
          name to pin value (HIGH/True for 1, LOW/False for 0).  All provided pins
          will be set to the given values.