How to use Semantics Utils in Isaacsim

[luckie00215]

i try to use
add_update_semantics(prim: pxr.Usd.Prim
, semantic_label: str
, type_label: str = ‘class’
, suffix=‘’ ) → None

for update label already usd in sceen

semantics.add_update_semantics(prim=f"/hospital/SM_WheelChair_01a2.usd",
sematic_lavel=“Chair”,)

it’s not working could anyone help me please.

[ahaidu]

Hi there,

it seems you are trying to add the semantic data directly to the usd file. You should however use the prim loaded in your stage.

Here is a snippet that might help:

from pxr import Semantics
from omni.isaac.core.utils.semantics import add_update_semantics

stage = omni.usd.get_context().get_stage()
prim = stage.DefinePrim("/MyCube", "Cube")
add_update_semantics(prim, "cube")

semantic_api = Semantics.SemanticsAPI.Get(prim, "Semantics")
type_attr = semantic_api.GetSemanticTypeAttr()
data_attr = semantic_api.GetSemanticDataAttr()

print(f"semantic type: {type_attr.Get()}, semantic data: {data_attr.Get()}")