TOPS mplay python

import subprocess
import os

def onGenerate(work_item):
    # Get the parent graph
    parent = work_item.parentItemHolder

    # Collect output file paths from upstream items
    all_inputs = parent.inputItems
    file_paths = []

    for item in all_inputs:
        # Adjust 'file' if your attribute is named differently
        path = item.attribValue('file')  
        if path and os.path.exists(path):
            file_paths.append(path)

    if file_paths:
        # Launch mplay with all the output files
        subprocess.Popen(["mplay"] + file_paths)
    else:
        print("No valid flipbook files found.")

    return True