def load(self, filename, file_format=None):
        """Load saved (pickled or dx) grid and edges from <filename>.pickle

           Grid.load(<filename>.pickle)
           Grid.load(<filename>.dx)

        The load() method calls the class's constructor method and
        completely resets all values, based on the loaded data.
        """
        loader = self._get_loader(filename, file_format=file_format)
        loader(filename)
Load saved (pickled or dx) grid and edges from <filename>.pickle

           Grid.load(<filename>.pickle)
           Grid.load(<filename>.dx)

        The load() method calls the class's constructor method and
        completely resets all values, based on the loaded data.