code: def load_nd_from_pickle(filename=None, path=''):
      
  
      abs_path = os.path.abspath(path)
  
      if filename is None:
          raise NotImplementedError
  
      return pickle.load(open(os.path.join(abs_path, filename), "rb"))
docs: Use pickle to save the whole nd-object to disc
  
      Parameters
      ----------
      filename : str
          Filename of nd pickle
      path : str
          Absolute or relative path where pickle should be saved. Default is ''
          which means pickle is save to PWD
  
      Returns
      -------
      nd : NetworkDing0
          Ding0 grid container object