human
I wrote the below code

    A = npr.randn(5, 6, 4)
    B = npr.randn(5, 6, 4)
    def fun(x):
        return to_scalar(np.concatenate((B, x, B), 1))
    d_fun = (lambda x: to_scalar(grad(fun)(x)))
    check_grads(fun, A)
    check_grads(d_fun, A)

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

def test_concatenate_axis_1_unnamed():