Method acquire

python/python3/tornado/locks.py:530–538

Attempt to lock. Returns an awaitable. Returns an awaitable, which raises `tornado.util.TimeoutError` after a timeout.

(
        self, timeout: Optional[Union[float, datetime.timedelta]] = None
    )

        return "<%s _block=%s>" % (self.__class__.__name__, self._block)

    def acquire(
        self, timeout: Optional[Union[float, datetime.timedelta]] = None
    ) -> Awaitable[_ReleasingContextManager]:
        """Attempt to lock. Returns an awaitable.

        Returns an awaitable, which raises `tornado.util.TimeoutError` after a
        timeout.
        """
        return self._block.acquire(timeout)

    def release(self) -> None:
        """Unlock.