code: def load(cls, filename):
          r
          fname = cls._parse_filename(filename)
          with open(fname, 'rb') as f:
              dct = pickle.load(f)
          return dct
docs: r"""
          Load data from the specified file into a Python dictionary
  
          Parameters
          ----------
          filename : string
              The path to the file to be opened
  
          Notes
          -----
          This returns a Python dictionary which can be converted into OpenPNM
          objects using the ``from_dict`` method of this class.