%type(PointInstancer)[*]

/root/level1/tree_instance[*]
/root/level1/bush_instance[*]

/root/level1/tree_instance
/root/level1/bush_instance
[*]

import hou
from pxr import Usd, UsdGeom

# Get the current stage from the current Solaris node
stage = hou.pwd().stage()

# Check if the stage is valid
if stage is None:
    raise ValueError("Error: No valid USD stage found. Please ensure you are in the correct context and the node has a valid USD stage.")

# Initialize an empty list to store the paths of PointInstancer primitives
point_instancers = []

# Function to check if a prim is visible
def is_prim_visible(prim):
    # Check if the prim has an attribute for visibility and it is set to 'invisible'
    visibility_attr = prim.GetAttribute('visibility')
    if visibility_attr and visibility_attr.Get() == 'invisible':
        return False
    return True

# Traverse through all prims in the stage
def traverse_stage(stage):
    for prim in stage.Traverse():
        # Skip deactivated prims
        if not prim.IsActive():
            continue
        # Skip invisible prims
        if not is_prim_visible(prim):
            continue
        # Check if the prim is a PointInstancer
        if prim.GetTypeName() == "PointInstancer":
            point_instancers.append(prim.GetPath().pathString + '[*]')
    return point_instancers
    
# # Call the function to traverse the stage
# traverse_stage(stage)

# # Print the list of PointInstancer primitives
# print("List of PointInstancer Primitives:")
# for path in point_instancers:
#     print(path)
    
    
    
# Call the function to traverse the stage
list = traverse_stage(stage)
list = " ".join(list)
return list

# ## Print the list of PointInstancer primitives
# print("List of PointInstancer Primitives:")
# for path in point_instancers:
#     print(path)

s@usdPrimPath=primintrinsic(0,"usdPrimPath",@primnum);
s@usdSrcPrimPath=primintrinsic(0,"usdSrcPrimPath",@primnum);
i@usdIndex=primintrinsic(0,"usdIndex",@primnum);
s@usd_path_unique =  s@usdPrimPath + "_" + s@usdSrcPrimPath + "_" + itoa(i@usdIndex);

Python error: Traceback (most recent call last):
File "", line 78, in 
File "", line 60, in getAttributes
File "C:\PROGRA~1/HOUDIN~2.5/HOUDIN~1.332/houdini/python3.11libs\houpythonportion\Geometry.py", line 382, in addAttrib
return orig_method(
^^^^^^^^^^^^
File "C:\PROGRA~1/HOUDIN~2.5/HOUDIN~1.332/houdini/python3.11libs\hou.py", line 43884, in addAttrib
return _hou.Geometry_addAttrib(self, *args)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
hou.OperationFailed: The attempted operation failed.
An attribute with this name already exists