code: def is_future(x):
      return isinstance(x, FUTURES)
  
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 a global function with example usage: is_future(x) and returns: isinstance