test_rop.py 文件源码

def test_Rop_dot_bug_18Oct2013_Jeremiah(self):
        # This test refers to a bug reported by Jeremiah Lowin on 18th Oct
        # 2013. The bug consists when through a dot operation there is only
        # one differentiable path (i.e. there is no gradient wrt to one of
        # the inputs).
        x = tensor.arange(20.0).reshape([1, 20])
        v = theano.shared(numpy.ones([20]))
        d = tensor.dot(x, v).sum()
        tensor.Rop(tensor.grad(d, v), v, v)