code: def set_close_exec(fd):
      """Sets the close-on-exec bit (``FD_CLOEXEC``)for a file descriptor."""
      raise NotImplementedError()
  
file_path: catboost/contrib/python/tornado/tornado-4/tornado/platform/interface.py
imports: from __future__ import absolute_import, division, print_function
label_desc: Use image node_id 1 for calling a global function with example usage: set_close_exec(fd) without return types