def h(self, x):
    (x1, x2) = x
    return (((x1 / (1 + (0.5 * np.sin(x2)))) + (x2 / (1 + (0.5 * np.sin(x1))))) + self.random.normal(scale=0.1))
def h(self, x):
    (x1, x2) = x
    return (((x1 / (1 + (0.5 * np.sin(x2)))) + (x2 / (1 + (0.5 * np.sin(x1))))) + self.random.normal(scale=0.1))