Python std示例

示例#1

def test_std5():
    obs = std([11.0, 11.0, 11.0, 11.0, 11.0, 11.0])
    exp = 0.0
    assert obs == exp

示例#2

def test_std4():
    obs = std([1.0, 2.0, 3.0, 4.0, 5.0])
    exp = 1.41421
    assert_allclose(obs, exp, atol=0.00001, rtol=0)

示例#3

def test_std2():
    obs = std([])
    exp = 0.0
    assert obs == exp

示例#4

def test_std3():
    obs = std([5.0])
    exp = 0.0
    assert obs == exp

示例#5

def test_std1():
    obs = std([0.0, 2.0])
    exp = 1.0
    assert obs == exp