usd attribute function

from pxr import Usd
import os

def get_basename_of_file_path_attr(prim, attr_name):
    """
    Returns the basename of the file path attribute as a string.

    Parameters:
        prim (Usd.Prim): The USD prim containing the attribute.
        attr_name (str): The name of the attribute (e.g., "inputs:texture:file").

    Returns:
        str: The basename of the file path if the attribute exists and is valid; otherwise, None.
    """
    # Get the attribute
    attr = prim.GetAttribute(attr_name)

    # Check if attribute exists and has a value
    if attr and attr.HasAuthoredValue():
        # Get the file path as a string
        file_path = attr.Get()

        # Extract and return the basename
        return os.path.basename(file_path)
    else:
        print(f"Attribute '{attr_name}' does not exist or has no value.")
        return None

# Usage example
# Assuming you have a USD stage and a prim
stage = Usd.Stage.Open("path_to_your_stage.usda")
prim = stage.GetPrimAtPath("/LightPrimPath")
basename = get_basename_of_file_path_attr(prim, "inputs:texture:file")
print("Basename:", basename)