docs: def rows_sum_init(hdf5_file, path, out_lock, *numpy_args):
      """Create global variables sharing the same object as the one pointed by
          'hdf5_file', 'path' and 'out_lock'.
          Also Create a NumPy array copy of a multiprocessing.Array ctypes array 
          specified by '*numpy_args'.
      """
  
      global g_hdf5_file, g_path, g_out, g_out_lock
          
      g_hdf5_file, g_path, g_out_lock = hdf5_file, path, out_lock
      g_out = to_numpy_array(*numpy_args)