'Loads a ground truth dataset
:param ground_truth: a list of real values (aka ground truth). E.g: [3.0, 1.0, 5.0, 2.0, 3.0]
:type ground_truth: list'

def load_ground_truth(self, ground_truth):

    if isinstance(ground_truth, list):
        self._ground_truth = list(ground_truth)
    else:
        self._ground_truth = ground_truth
