code: def wait_for_background_commands():
      """This waits for all threads to exit.  You will often want to
      run this at the end of programs that have launched background
      threads, so that the program will wait for its child processes
      to terminate before it dies."""
      for t in threading.enumerate():
          if not t == threading.current_thread():
              t.join()
  
file_path: delta/egs/sre16/v1/local/make_sre18_dev.py
imports: import threading
  import warnings
  import argparse
  import os
  import sys
  import traceback
label_desc: Use image node_id 5 for calling a global function with example usage: wait_for_background_commands() without return types