code: def Move(self, units):
          ' Move some distance units from current position '
          steps = units * self.SPU  # translate units to steps 
          if steps > 0:                                          # look for direction
              spi.SPI_write(self.CS, [0x40 | (~self.Dir & 1), 0x40 | (~self.Dir & 1)])       
          else:
              spi.SPI_write(self.CS, [0x40 | (self.Dir & 1), 0x40 | (self.Dir & 1)]) 
          steps = int(abs(steps))     
          spi.SPI_write(self.CS, [(steps >> 16) & 0xFF, (steps >> 16) & 0xFF])
          spi.SPI_write(self.CS, [(steps >> 8) & 0xFF, (steps >> 8) & 0xFF])
          spi.SPI_write(self.CS, [steps & 0xFF, steps & 0xFF]f Move(self, units):
          ' Move some distance units from current position '
          steps = units * self.SPU  # translate units to steps 
          if steps > 0:                                          # look for direction
              spi.SPI_write(self.CS, [0x40 | (~self.Dir & 1), 0x40 | (~self.Dir & 1)])       
          else:
              spi.SPI_write(self.CS, [0x40 | (self.Dir & 1), 0x40 | (self.Dir & 1)]) 
          steps = int(abs(steps))     
          spi.SPI_write(self.CS, [(steps >> 16) & 0xFF, (steps >> 16) & 0xFF])
          spi.SPI_write(self.CS, [(steps >> 8) & 0xFF, (steps >> 8) & 0xFF])
          spi.SPI_write(self.CS, [steps & 0xFF, steps & 0xFF])
docs: Move some distance units from current position