code: def run(self):
      import unittest
      import tests
  
      tests.setup()
      suite = unittest.TestLoader().loadTestsFromModule(tests)
      # verbosity of zero doesn't print anything, one prints a dot
      # per test and two prints each test name
      result = unittest.TextTestRunner(
          verbosity=self.show_tests + 1
      ).run(suite)
      if not result.wasSuccessful():
          sys.exit(1)
  
imports: import os
  import sys
  import shlex
  import glob
  import re
  import time
  import zipfile
  import tarfile
  from distutils.command import build_ext, build, sdist
label_desc: Use image node_id 3 for calling the run_tests obj's underlying member method code with example usage: obj.run() without return types