code: def submit(self, fn, /, *args, **kwargs):
      with self._shutdown_lock, _global_shutdown_lock:
          if self._broken:
              raise BrokenThreadPool(self._broken)
  
          if self._shutdown:
              raise RuntimeError(
                  "cannot schedule new futures after shutdown"
              )
          if _shutdown:
              raise RuntimeError(
                  "cannot schedule new futures after "
                  "interpreter shutdown"
              )
  
          f = _base.Future()
          w = _WorkItem(f, fn, args, kwargs)
  
          self._work_queue.put(w)
          self._adjust_thread_count()
          return f
  
imports: from concurrent.futures import _base
  import itertools
  import queue
  import threading
  import types
  import weakref
  import os
label_desc: Use image node_id 2 for calling the ThreadPoolExecutor obj's underlying member method code with example usage: obj.submit() and returns: f