def _type_to_proto(t: torch._C.TensorType) -> onnx.TypeProto:
if t.kind() == "NoneType":
return onnx.TypeProto()
ret: onnx.TypeProto = onnx.TypeProto()
ret.denotation = repr(t)
if t.kind() == "ListType":
ret.sequence_type.elem_type.CopyFrom(_type_to_proto(cast(torch._C.TensorType, t.getElementType())))
return ret
if t.kind() == "IntType":
ret.tensor_type.elem_type = onnx.TensorProto.DataType.INT64
ret.tensor_type.shape.CopyFrom(onnx.TensorShapeProto())
return ret
assert t.kind() == "TensorType", f"Not Tensor type(actual: {t.kind()}): {t}"
if t.scalarType() is None:
ret.tensor_type.elem_type = onnx.TensorProto.DataType.UNDEFINED
else:
ret.tensor_type.elem_type = int( # type: ignore
sym_hel.cast_pytorch_to_onnx[t.scalarType()] # type: ignore[index]
)
ret.tensor_type.shape.CopyFrom(onnx.TensorShapeProto())
if t.sizes() is not None:
for s in t.sizes(): # type: ignore
d = ret.tensor_type.shape.dim.add()
d.dim_value = s
assert ret.tensor_type.HasField("shape")
return ret
def add_initializers_into_inputs(model: onnx.ModelProto) -> onnx.ModelProto:
for x in model.graph.initializer:
input_names = [x.name for x in model.graph.input]
if x.name not in input_names:
shape = onnx.TensorShapeProto()
for dim in x.dims:
shape.dim.extend([onnx.TensorShapeProto.Dimension(dim_value=dim)])
model.graph.input.extend(
[onnx.ValueInfoProto(name=x.name,
type=onnx.TypeProto(tensor_type=onnx.TypeProto.Tensor(elem_type=x.data_type,
shape=shape)))])
return model
def add_initializers_into_inputs(model: onnx.ModelProto) -> onnx.ModelProto:
# Due to a onnx bug, https://github.com/onnx/onnx/issues/2417, we need to add missing initializers into inputs
for x in model.graph.initializer:
input_names = [x.name for x in model.graph.input]
if x.name not in input_names:
shape = onnx.TensorShapeProto()
for dim in x.dims:
shape.dim.extend(
[onnx.TensorShapeProto.Dimension(dim_value=dim)])
model.graph.input.extend([
onnx.ValueInfoProto(
name=x.name,
type=onnx.TypeProto(tensor_type=onnx.TypeProto.Tensor(
elem_type=x.data_type, shape=shape)))
])
return model
