Future set_result
A Future is a special low-level awaitable object that represents an eventual result of an asynchronous operation. When a Future object is awaited it means that the coroutine will wait until the Future is resolved in some other place. Future objects in asyncio are needed to allow callback-based code to be used with async/await. After reading the documentation a bit more thoroughly it seems that the future's value should be set in a callback scheduled with the event loop: def wrap_opencl_event(event): loop = asyncio.get_event_loop() f = loop.create_future() event.set_callback(pyopencl.command_execution_status.COMPLETE, lambda status: loop.call_soon_threadsafe(f.set_result, None)) return f Created on 2014-06-30 14:05 by vstinner, last changed 2014-07-05 13:32 by vstinner.This issue is now closed. Future.set_result is not safe to use with loop.call_soon() here is test for that issue: @mock.patch('asyncio.base_events.logger') Future Object¶ class asyncio.Future (*, loop=None) ¶ A Future represents an eventual result of an asynchronous operation. Not thread-safe. Future is an awaitable object. Coroutines can await on Future objects until they either have a result or an exception set, or until they are cancelled. A Future represents the result of work that has not been completed yet. The event loop can watch for a Future object’s state to indicate that it is done, allowing one part of an application to wait for another part to finish some work. Waiting for a Future ¶ A Future represents the result of an asynchronous computation. Methods are provided to check if the computation is complete, to wait for its completion, and to retrieve the result of the computation. The result can only be retrieved using method get when the computation has completed, blocking if necessary until it is ready. Cancellation is performed by the cancel method.
Future objects in asyncio are needed to allow callback-based code to be used with Task inherits from Future all of its APIs except Future.set_result() and
A Future represents the result of work that has not been completed yet. The event loop can watch for a Future object’s state to indicate that it is done, allowing one part of an application to wait for another part to finish some work. Waiting for a Future ¶ A Future represents the result of an asynchronous computation. Methods are provided to check if the computation is complete, to wait for its completion, and to retrieve the result of the computation. The result can only be retrieved using method get when the computation has completed, blocking if necessary until it is ready. Cancellation is performed by the cancel method. Simply put, the Future class represents a future result of an asynchronous computation – a result that will eventually appear in the Future after the processing is complete. Let's see how to write methods that create and return a Future instance. tornado.concurrent.future_add_done_callback (future: Union[futures.Future[_T], Future[_T]], callback: Callable[[], None]) → None [source] ¶ Arrange to call callback when future is complete. callback is invoked with one argument, the future. If future is already done, callback is invoked immediately. Future.set_result and Future.set_exception now raise InvalidStateError if the futures are not pending or running. This mirrors the behavior of asyncio.Future, and prevents AssertionErrors in asyncio.wrap_future when set_result is called multiple times.
tornado.concurrent.future_add_done_callback (future: Union[futures.Future[_T], Future[_T]], callback: Callable[[], None]) → None [source] ¶ Arrange to call callback when future is complete. callback is invoked with one argument, the future. If future is already done, callback is invoked immediately.
Futures and tasks can be cancelled explicitly with their Future.cancel() method. Don't call set_result() or set_exception() method of Future if the future is def set_result(self, result):. """Mark the future done and set its result. If the future is already done when this method is called, raises. InvalidStateError. """ if self. 24 май 2019 Специальный подкласс класса Future для запуска корутин на цикле событий. Поехали! Цикл событий — основная составляющая 18 Feb 2020 import pytest import asyncio @pytest.fixture() def mock_sum(mocker): future = asyncio.Future() future.set_result(4) mocker.patch('app.sum',
GSET Result 2019 -2020: The result for the Gujarat SET examination is released by the Maharaja Sayajirao University of Baroda, Vadodara.Candidates can check the result of Assistant Professor on the official website i.e. www.gujaratset.ac.in. To check the result candidates have to enter Order Number and SBIePay Reference ID at the result login page.
Future objects are used to bridge low-level callback-based code with high-level If the Future is done and has a result set by the set_result() method, the result Future objects in asyncio are needed to allow callback-based code to be used with Task inherits from Future all of its APIs except Future.set_result() and Here a Future is created, the set_result method for that future is scheduled to be called after however long the caller wants to sleep, and then yield from is called on Future except KeyError: pass else: payload = self.deserialize(message.body) if message.type == 'result': future.set_result(payload) elif message.type == 'error': 18 Dec 2016 The state of the Future changes to done when set_result() is called, and the Future instance retains the result given to the method for retrieval
tornado.concurrent.future_add_done_callback (future: Union[futures.Future[_T], Future[_T]], callback: Callable[[], None]) → None [source] ¶ Arrange to call callback when future is complete. callback is invoked with one argument, the future. If future is already done, callback is invoked immediately.
Future objects in asyncio are needed to allow callback-based code to be used with Task inherits from Future all of its APIs except Future.set_result() and Here a Future is created, the set_result method for that future is scheduled to be called after however long the caller wants to sleep, and then yield from is called on Future except KeyError: pass else: payload = self.deserialize(message.body) if message.type == 'result': future.set_result(payload) elif message.type == 'error': 18 Dec 2016 The state of the Future changes to done when set_result() is called, and the Future instance retains the result given to the method for retrieval 26 Sep 2017 asyncio_hello_world_naive.py import asyncio async def slow_operation(future): await asyncio.sleep(1) future.set_result('Hello World!') future
def set_result(self, result):. """Mark the future done and set its result. If the future is already done when this method is called, raises. InvalidStateError. """ if self. 24 май 2019 Специальный подкласс класса Future для запуска корутин на цикле событий. Поехали! Цикл событий — основная составляющая 18 Feb 2020 import pytest import asyncio @pytest.fixture() def mock_sum(mocker): future = asyncio.Future() future.set_result(4) mocker.patch('app.sum', 11 Mar 2014 __init__() for future in futures: future.add_done_callback(self.done_callback) def done_callback(self, future): self.set_result(future). 4 Nov 2017 of our future object future.set_result("My Coroutine-turned-future has completed") async def main(): # define a future object future = asyncio. try: result = self.fn(*self.args, **self.kwargs). except BaseException: e, tb = sys. exc_info()[1:] self.future.set_exception_info(e, tb). else: self.future.set_result( result).