Houdini Solaris inspector custom data via Python

inspect_usd_prim.py

# This can run a custom python code to evaluate something useful.
# The code is located in Program Files/SideFx.../Houdini v.v.v/houdini/scene/inspect_usd_prim.py
#
# Coded this little function to fetch the first Mesh subprim and a specific attribute from it.
# It detects if the attribute is a list/array and then it outputs min:max values,
# otherwise it outputs the actual value or indicates if the attribute is not present.
# Not sure how Python can handle all the diversity of the USD datatypes yet,
# so you'll have to take care of it from here for vectors/matrices/etc.
#
# Read the help text in the inspect_usd_prim.py, there's a flag to disable code caching,
# so your edits would be live while you working on it. Have fun!

import hou
from pxr import Sdf, Usd, UsdGeom # can be useful but not here

def inspect(viewer, viewport, stage, primpath):
    attr_name = "primvars:hl" # set the attribute name
    try:
        parent_prim = stage.GetPrimAtPath(primpath)
        child_prim = parent_prim.GetChildren()[0]
        attr = child_prim.GetAttribute(attr_name)
        if attr.IsValid():
            attr_val = attr.Get(hou.time())
            if hasattr(type(attr_val), '__len__'):
                res = f'{child_prim.GetName()}\n {attr_name}({len(attr_val)}) = {min(attr_val)}:{max(attr_val)}' # min:max values for data that has length
            else:
                res = f'{child_prim.GetName()}\n {attr_name} = {attr_val}'
        else:
            res = f'{child_prim.GetName()}\n {attr_name} not found'
        return res
    except:
        import traceback
        return traceback.format_exc()