How to use the wsgiref.util.guess_scheme function in wsgiref

def testGuessScheme(self):
        self.assertEqual(util.guess_scheme({}), "http")
        self.assertEqual(util.guess_scheme({'HTTPS':"foo"}), "http")
        self.assertEqual(util.guess_scheme({'HTTPS':"on"}), "https")
        self.assertEqual(util.guess_scheme({'HTTPS':"yes"}), "https")
        self.assertEqual(util.guess_scheme({'HTTPS':"1"}), "https")

def testGuessScheme(self):
        self.assertEqual(util.guess_scheme({}), "http")
        self.assertEqual(util.guess_scheme({'HTTPS':"foo"}), "http")
        self.assertEqual(util.guess_scheme({'HTTPS':"on"}), "https")
        self.assertEqual(util.guess_scheme({'HTTPS':"yes"}), "https")
        self.assertEqual(util.guess_scheme({'HTTPS':"1"}), "https")

def testGuessScheme(self):
        self.assertEqual(util.guess_scheme({}), "http")
        self.assertEqual(util.guess_scheme({'HTTPS':"foo"}), "http")
        self.assertEqual(util.guess_scheme({'HTTPS':"on"}), "https")
        self.assertEqual(util.guess_scheme({'HTTPS':"yes"}), "https")
        self.assertEqual(util.guess_scheme({'HTTPS':"1"}), "https")

def testGuessScheme(self):
        self.assertEqual(util.guess_scheme({}), "http")
        self.assertEqual(util.guess_scheme({'HTTPS':"foo"}), "http")
        self.assertEqual(util.guess_scheme({'HTTPS':"on"}), "https")
        self.assertEqual(util.guess_scheme({'HTTPS':"yes"}), "https")
        self.assertEqual(util.guess_scheme({'HTTPS':"1"}), "https")

def testGuessScheme(self):
        self.assertEqual(util.guess_scheme({}), "http")
        self.assertEqual(util.guess_scheme({'HTTPS':"foo"}), "http")
        self.assertEqual(util.guess_scheme({'HTTPS':"on"}), "https")
        self.assertEqual(util.guess_scheme({'HTTPS':"yes"}), "https")
        self.assertEqual(util.guess_scheme({'HTTPS':"1"}), "https")

def request_scheme(self):
        """Request Scheme (http|https)
        """
        return wsgiref.util.guess_scheme(self.environ)

def is_https(self):
        scheme = self.__environ.get('wsgi.url_scheme', guess_scheme(self.__environ))
        return int(scheme == 'https')

def run_bare_wsgi_app(application):
  """Like run_wsgi_app() but doesn't add WSGI middleware."""
  env = dict(os.environ)
  env["wsgi.input"] = sys.stdin
  env["wsgi.errors"] = sys.stderr
  env["wsgi.version"] = (1, 0)
  env["wsgi.run_once"] = True
  env["wsgi.url_scheme"] = wsgiref.util.guess_scheme(env)
  env["wsgi.multithread"] = False
  env["wsgi.multiprocess"] = False
  result = application(env, _start_response)
  if result is not None:
    for data in result:
      sys.stdout.write(data)

def run_bare_wsgi_app(application):
  """Like run_wsgi_app() but doesn't add WSGI middleware."""
  env = dict(os.environ)
  env["wsgi.input"] = sys.stdin
  env["wsgi.errors"] = sys.stderr
  env["wsgi.version"] = (1, 0)
  env["wsgi.run_once"] = True
  env["wsgi.url_scheme"] = wsgiref.util.guess_scheme(env)
  env["wsgi.multithread"] = False
  env["wsgi.multiprocess"] = False
  result = application(env, _start_response)
  try:
    if result is not None:
      for data in result:
        sys.stdout.write(data)
  finally:
    if hasattr(result, 'close'):
      result.close()