Caluculate the weight of multipe paths.

def calc_weight_of_multiple_paths(path_scores, impact_div=12):
    """Caluculate the weight of multipe paths."""
    number_of_paths = len(path_scores)
    if number_of_paths > 1:
        score_total = 0.0
        highest_score = 0.0
        for score in path_scores.Scores:
            score_total += score
            if highest_score < score:
                highest_score = score

        score_mean = score_total / number_of_paths
        # print "score_total: {}".format(score_total)
        # print "score_mean: {}".format(score_mean)
        # print "number_of_paths: {}".format(number_of_paths)

        # Calculate the weight depending on how many ways are found
        weight_count_impact = number_of_paths / float(number_of_paths +
                                                      impact_div)
        # print "weight_count_impact: {}".format(weight_count_impact)

        new_score = highest_score + ((1 + weight_count_impact) * score_mean)
        # print "new_score: {}".format(new_score)

        return new_score, highest_score, number_of_paths

    else:
        return (path_scores.Scores.iloc[0], path_scores.Scores.iloc[0],
                number_of_paths)