def _run_io_threads(self, handler):
reader = ReadingThread(self.settings, handler, daemon = self.daemon,<EOL>exc_queue = self.exc_queue)<EOL>writter = WrittingThread(self.settings, handler, daemon = self.daemon,<EOL>exc_queue = self.exc_queue)<EOL>self.io_threads += [reader, writter]<EOL>reader.start()<EOL>writter.start()<EOL>
Start threads for an IOHandler.