def __init__(self, wrt, f, args=None):
        # TODO: document method
        super(Xnes, self).__init__(wrt, args=args)
        self._f = f
        # Set some default values.
        dim = self.wrt.shape[0]
        log_dim = scipy.log(dim)
        self.step_rate = 0.6 * dim / scipy.sqrt(dim) / (3 + log_dim)
        self.batch_size = 4 + int(scipy.floor(3 * log_dim))
dataset/ETHPy150Open BRML/climin/climin/nes.py/Xnes.__init__/swapped operands of `/`