human
I wrote the below code

    def softplus(x):
        return np.log((np.ones_like(x) + np.exp(x)))
    x = K.placeholder(ndim=2)
    f = K.function([x], [activations.softplus(x)])
    test_values = get_standard_values()
    result = f([test_values])[0]
    expected = softplus(test_values)
    assert_allclose(result, expected, rtol=1e-05)

What's a good function header?

=====
Here's a good function header?
assistant
#Here's a good function header.

def test_softplus():