remove st attributes

from pxr import Usd, UsdGeom

def remove_st_primvars(prim):
    """
    Recursively removes 'st' primvars using PrimvarsAPI from the given prim and all its children.
    """
    primvars_api = UsdGeom.PrimvarsAPI(prim)
    if primvars_api.HasPrimvar("st"):
        primvar = primvars_api.GetPrimvar("st")
        primvar.GetAttr().Clear()
        print(f"'st' primvar removed from {prim.GetPath()}")

    # Recursively remove 'st' from all child prims
    for child in prim.GetChildren():
        remove_st_primvars(child)

# Access the stage in Houdini's LOPs context
stage = hou.node('/path/to/your/python_lop').stage()

# Specify the top-level prim path
top_prim_path = "/path/to/your/top/prim"
top_prim = stage.GetPrimAtPath(top_prim_path)

# Apply the function to the top prim and its descendants
if top_prim:
    remove_st_primvars(top_prim)
else:
    print(f"No prim found at path {top_prim_path}")

# Save the stage to persist changes
stage.GetRootLayer().Save()