code: def main():
      if "-r" not in sys.argv:
          unittest.main()
      else:
          regenerate_expected_output(__file__, ProfileTest)
  
imports: import sys
  import pstats
  import unittest
  import os
  from difflib import unified_diff
  from io import StringIO
  from test.support.os_helper import TESTFN, unlink, temp_dir, change_cwd
  from contextlib import contextmanager
  import profile
  from test.profilee import testfunc, timer
  from test.support.script_helper import assert_python_failure, assert_python_ok
label_desc: Use image node_id 3 for calling a global function with example usage: main() without return types