def __init__(self, scale=0.1, rng = None):
        if rng is None:
            self.rng = np.random.RandomState(42)
        else:
            self.rng = rng
        self.scale = scale
Horseshoe Prior as it is used in spearmint
dataset/ETHPy150Open automl/RoBO/robo/priors/base_prior.py/HorseshoePrior.__init__