code: def test_main_bad_switch(self):
      s = self.run_main(switches=["--bad-switch"])
      self.assertEqual(
          s,
          dedent(
              """\
              option --bad-switch not recognized
              use -h/--help for command line help
              """
          ),
      )
  
imports: import timeit
  import unittest
  import sys
  import io
  from textwrap import dedent
  from test.support import captured_stdout
  from test.support import captured_stderr
label_desc: Use image node_id 31 for calling the TestTimeit obj's underlying member method code with example usage: obj.test_main_bad_switch() without return types