docs: def axes(self, offset = False):
          """returns measured value in miligauss"""
          reg, self._scale = self.SCALES[self._gauss]
          x = self.bus.read_int16_data(self.address, self.HMC5883L_DXRA) 
          if x == -4096: x = OVERFLOW
          y = self.bus.read_int16_data(self.address, self.HMC5883L_DYRA)
          if y == -4096: y = OVERFLOW
          z = self.bus.read_int16_data(self.address, self.HMC5883L_DZRA)
          if z == -4096: z = OVERFLOW
  
          x*=self._scale
          y*=self._scale
          z*=self._scale
  
          if offset: (x, y, z) = self.__offset((x,y,z))
  
          return (x, y, z)