code: def save_voxel_grid(voxel_grid, file_name):
      
      try:
          with open(file_name, 'wb') as fp:
              for voxel in voxel_grid:
                  fp.write(struct.pack("<I", voxel))
      except IOError as e:
          print("An error occurred: {}".format(e.args[-1]))
          raise e
      except Exception:
          raise
docs: Saves binary voxel grid as a binary file.
  
      The binary file is structured in little-endian unsigned int format.
  
      :param voxel_grid: binary voxel grid
      :type voxel_grid: list, tuple
      :param file_name: file name to save
      :type file_name: str