def get_environ(environ):
 for key in ('REMOTE_ADDR', 'SERVER_NAME', 'SERVER_PORT'):
  if (key in environ):
   (yield (key, environ[key]))

def get_environ ( environ ) : for key in ( 'REMOTE_ADDR' , 'SERVER_NAME' , 'SERVER_PORT' ) : if ( key in environ ) : ( yield ( key , environ [ key ] ) )
returns our whitelisted environment variables .