class EFeatureObjective(bluepyopt.objectives.Objective):

    """EPhys feature objective"""

    def __init__(self, name, features=None):
        """Constructor
        Args:
            name (str): name of this object
            features (list of eFeatures): features used in the Objective
        """

        super(EFeatureObjective, self).__init__(name)
        self.name = name
        self.features = features

    def calculate_feature_scores(self, responses):
        """Calculate the scores for the individual features"""

        scores = []
        for feature in self.features:
            scores.append(feature.calculate_score(responses))

        return scores


class SingletonObjective(EFeatureObjective):

    """Single EPhys feature"""

    def __init__(self, name, feature):
        """Constructor
        Args:
            name (str): name of this object
            features (EFeature): single eFeature inside this objective
        """

        super(SingletonObjective, self).__init__(name, [feature])

    def calculate_score(self, responses):
        """Objective score"""

        return self.calculate_feature_scores(responses)[0]

    def __str__(self):
        """String representation"""

        return '( %s )' % self.features[0]

def calculate_feature_scores(self, responses):
         pass

def calculate_feature_scores(self, responses):
     super(SingletonObjective, self).calculate_feature_scores(responses)

def calculate_score(self, responses):
         """Objective score"""

         return self.calculate_feature_scores(responses)[0]