test_variable.py 文件源码

def check_shape_mismatch(self, x_data):
        xp = cuda.get_array_module(x_data)

        class DummyFunction(chainer.Function):
            label = 'dummy_function'

            def forward(self, inputs):
                return xp.array(1, np.float32),

            def backward(self, inputs, grads):
                return xp.array([1, 2], np.float32),

        x = chainer.Variable(x_data)
        y = DummyFunction()(x)
        with six.assertRaisesRegex(self, ValueError, 'dummy_function'):
            y.backward()