code: def doctests():
      import doctest
  
      return doctest.DocTestSuite()
  
imports: from __future__ import absolute_import, division, print_function
  import array
  import atexit
  import os
  import re
  import sys
  import zlib
label_desc: Use image node_id 9 for calling a global function with example usage: doctests() and returns: doctest