#NEWLINE# def is_dict_of_states( self , arg ) : #NEWLINE# #INDENT# "\n        A dict of states example -\n        {'x1': 'easy', 'x2':'hard', 'x3': 'medium'}\n\n        Returns\n        -------\n        True, if arg is dict of states else False.\n\n        " #NEWLINE# return isinstance ( arg , dict )