def test_basic_eq_v():
x = RD.logistic(RD(3))
v = RD.logistic(RD(3))
assert x==v, Exception(f'test_basic_eq_v() has error.')
def test_basic_ne_v():
x = RD.logistic(RD(3))
v = RD.logarithm(RD.logistic(RD(3)), np.e)
assert x!=v, Exception(f'test_basic_ne_v() has error.')
def test_basic_logistic_v():
x = RD(3)
derivative = RD.logistic(x)
assert (float(derivative.val) == 1/(1 + np.e**(-3))) & (float(x.get_gradient()) == (np.e**(3))/(1 + np.e**3)), Exception(f'test_basic_logistic_v() has error.')
