code: def app():
      return APPLICATION
  
file_path: perspective/python/perspective/perspective/tests/handlers/test_tornado_thread_pool_executor.py
imports: import asyncio
  import pytest
  import random
  import threading
  import tornado
  import concurrent.futures
  from datetime import datetime
  from perspective import Table, PerspectiveManager, PerspectiveTornadoHandler, tornado_websocket
label_desc: Use image node_id 2 for calling a global function with example usage: app() and returns: APPLICATION