code: def install_virtualenv_p3(root, python_version):
      
      import venv
      builder = venv.EnvBuilder(system_site_packages=False, clear=True, symlinks=False, upgrade=False)
      builder.create(root)
      ret_code = subprocess.call([VE_SCRIPT, PROJECT_ROOT, root, python_version])
      sys.exit(ret_code)
docs: Install virtual environment for Python 3.3+; removing the old one if it exists