+ if isinstance(threading.current_thread(), threading._MainThread):
+ try:
+ with Timer(timeout=timeout):
+ while not predicate():
+ time.sleep(sleep)
+ except exceptions.TimerTimeout:
+ if exception and issubclass(exception, Exception):
+ raise exception # pylint: disable=raising-bad-type
+ raise exceptions.WaitTimeout
+ else:
+ with Timer() as timer:
+ while timer.delta_time_sec() < timeout:
+ if predicate():
+ return