code: def submit(self, fn, *args, **kwargs):
      future = TracebackFuture()
      try:
          future.set_result(fn(*args, **kwargs))
      except Exception:
          future.set_exc_info(sys.exc_info())
      return future
  
imports: from __future__ import absolute_import, division, print_function
  import functools
  import platform
  import textwrap
  import traceback
  import sys
  from tornado.log import app_log
  from tornado.stack_context import ExceptionStackContext, wrap
  from tornado.util import raise_exc_info, ArgReplacer, is_finalizing
label_desc: Use image node_id 1 for calling the DummyExecutor obj's underlying member method code with example usage: obj.submit(fn) and returns: future