Load a SOM from a JSON file saved with this package..

        Parameters
        ----------
        path : str
            The path to the JSON file.

        Returns
        -------
        s : cls
            A som of the specified class.

def load(cls, path):
        """
        Load a SOM from a JSON file saved with this package..

        Parameters
        ----------
        path : str
            The path to the JSON file.

        Returns
        -------
        s : cls
            A som of the specified class.

        """
        data = json.load(open(path))

        weights = data['weights']
        weights = np.asarray(weights, dtype=np.float64)

        s = cls(data['map_dimensions'],
                data['params']['lr']['orig'],
                data['data_dimensionality'],
                influence=data['params']['infl']['orig'],
                lr_lambda=data['params']['lr']['factor'],
                infl_lambda=data['params']['infl']['factor'])

        s.weights = weights
        s.trained = True

        return s