def forward_fn():
model_out = _run_forward(
forward_func, inputs, None, additional_forward_args
)
return _select_targets(
torch.cat((model_out[:, 0], model_out[:, 1])), target
)
def _forward_with_loss() -> Tensor:
additional_inputs = _format_additional_forward_args(
additional_forward_args)
outputs = self.forward_func( # type: ignore
*(*inputs, *additional_inputs) # type: ignore
if additional_inputs is not None else inputs)
if self.loss_func is not None:
return self.loss_func(outputs, target)
else:
loss = -torch.log(outputs)
return _select_targets(loss, target)
def test_select_target_2d(self) -> None:
output_tensor = torch.tensor([[1, 2, 3], [4, 5, 6], [7, 8, 9]])
assertTensorAlmostEqual(self, _select_targets(output_tensor, 1), [2, 5, 8])
assertTensorAlmostEqual(
self, _select_targets(output_tensor, torch.tensor(0)), [1, 4, 7]
)
assertTensorAlmostEqual(
self, _select_targets(output_tensor, torch.tensor([1, 2, 0])), [2, 6, 7]
)
assertTensorAlmostEqual(
self, _select_targets(output_tensor, [1, 2, 0]), [2, 6, 7]
)
# Verify error is raised if too many dimensions are provided.
with self.assertRaises(AssertionError):
_select_targets(output_tensor, (1, 2))
def test_select_target_3d(self) -> None:
output_tensor = torch.tensor([[[1, 2, 3], [4, 5, 6], [7, 8, 9]],
[[9, 8, 7], [6, 5, 4], [3, 2, 1]]])
assertTensorAlmostEqual(self, _select_targets(output_tensor, (0, 1)),
[2, 8])
assertTensorAlmostEqual(
self,
_select_targets(output_tensor,
cast(List[Tuple[int, ...]], [(0, 1), (2, 0)])),
[2, 3],
)
# Verify error is raised if list is longer than number of examples.
with self.assertRaises(AssertionError):
_select_targets(
output_tensor,
cast(List[Tuple[int, ...]], [(0, 1), (2, 0), (3, 2)]))
# Verify error is raised if too many dimensions are provided.
with self.assertRaises(AssertionError):
_select_targets(output_tensor, (1, 2, 3))