code: def position_sp(self):
          
          self._position_sp, value = self.get_attr_int(self._position_sp, 'position_sp')
          return value
docs: Writing specifies the target position for the `run-to-abs-pos` and `run-to-rel-pos`
          commands. Reading returns the current value. Units are in tacho counts. You
          can use the value returned by `count_per_rot` to convert tacho counts to/from
          rotations or degrees.