redis storage open state initialization? about pybreaker HOT 3 CLOSED

BREAKER = CircuitBreaker(...)
...
    def active(self):
        timeout = timedelta(seconds=BREAKER.reset_timeout)
        timeout_active = not hasattr(BREAKER.state, 'opened_at') or \
            hasattr(BREAKER.state, 'opened_at') and datetime.now() < BREAKER.state.opened_at + timeout
        return BREAKER.current_state == 'closed' or not timeout_active

import pybreaker

def circuit_breaker_open(self):
    with self._lock:
        self.state = self._state_storage.state = pybreaker.STATE_OPEN
        self._state_storage.opened_at = pybreaker.datetime.utcnow()

def circuit_open_state_init(self, cb, prev_state=None, notify=False):
    super(pybreaker.CircuitOpenState, self).__init__(cb, pybreaker.STATE_OPEN)
    try:
        _ = self._breaker._state_storage.opened_at
    except:
        self._breaker._state_storage.opened_at = pybreaker.datetime.utcnow()
    if notify:
        for listener in self._breaker.listeners:
            listener.state_change(self._breaker, prev_state, self)

pybreaker.CircuitBreaker.open = circuit_breaker_open
pybreaker.CircuitOpenState.__init__ = circuit_open_state_init