code: def posix_locale(self):
      loc = locale.setlocale(locale.LC_CTYPE, None)
      return loc in POSIX_LOCALES
  
imports: import locale
  import subprocess
  import sys
  import textwrap
  import unittest
  from test import support
  from test.support.script_helper import assert_python_ok, assert_python_failure
  from test.support import os_helper, MS_WINDOWS
label_desc: Use image node_id 1 for calling the UTF8ModeTests obj's underlying member method code with example usage: obj.posix_locale() and returns: unknown