Method to validate the structure of training data stats

def validate_training_data_stats(training_data_stats):
        """
            Method to validate the structure of training data stats
        """
        stat_keys = list(training_data_stats.keys())
        valid_stat_keys = ["means", "mins", "maxs", "stds", "feature_values", "feature_frequencies"]
        missing_keys = list(set(valid_stat_keys) - set(stat_keys))
        if len(missing_keys) > 0:
            raise Exception("Missing keys in training_data_stats. Details:" % (missing_keys))