code: def get_variables_path(export_dir):
    
    return os.path.join(
        tf.compat.as_bytes(export_dir),
        tf.compat.as_bytes(tf_v1.saved_model.constants.VARIABLES_DIRECTORY),
        tf.compat.as_bytes(tf_v1.saved_model.constants.VARIABLES_FILENAME))
docs: Returns the path for storing variables checkpoints.