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PromisedIO

PromisedIO is free and open source software released under the permissive MIT license.

promise

You can read about promises here.

deferred() -> Deferred

Create new Deferred object.

Deferred.promise() -> Promise

Get related Promise object.

Deferred.resolve(value: object) -> None

Resolve related Promise object with the given value.

Deferred.reject(exc: Exception) -> None

Reject related Promise object with the given exception exc.

Promise.then(fulfilled: Callable[[object], object], rejected: Callable[[Exception], object]) -> Promise

Create new Promise. It takes up to two arguments: callback functions for the success and failure cases of the Promise.

Promise.catch(rejected: Callable[[Exception], object]) -> Promise

The same as .then(None, rejected)

exec_async(coro: Coroutine) -> None

Start coroutine.

clearfreelists() -> None

Clear freelists.

setfreelistlimits(promise_limit: int = -1, promiseiter_limit: int = -1, deferred_limit: int = -1) -> None

Set new freelist limits

process_promise_chain() -> None

Process all scheduled (resolved or rejected) promises.

run_forever() -> None

Start simple event loop.

Lock() -> Lock

Create new Lock object.

Lock.acquire() -> Promise

Acquire a lock.

Lock.release() -> None

Release a lock.