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How to use to_async_generator method in localstack

Best Python code snippet using localstack_python

toasyncgenerator.py

Source:toasyncgenerator.py

...3import rx4from rx import operators as ops5from rx.scheduler.eventloop import AsyncIOScheduler6from rx.core import Observable7def to_async_generator(sentinel=None):8    loop = asyncio.get_event_loop()9    future = Future()10    notifications = []11    def _to_async_generator(source: Observable):12        def feeder():13            nonlocal future14            if not notifications or future.done():15                return16            notification = notifications.pop(0)17            if notification.kind == "E":18                future.set_exception(notification.exception)19            elif notification.kind == "C":20                future.set_result(sentinel)21            else:22                future.set_result(notification.value)23        def on_next(value):24            """Takes on_next values and appends them to the notification queue"""25            notifications.append(value)26            loop.call_soon(feeder)27        source.pipe(ops.materialize()).subscribe(on_next)28        @asyncio.coroutine29        def gen():30            """Generator producing futures"""31            nonlocal future32            loop.call_soon(feeder)33            future = Future()34            return future35        return gen36    return _to_async_generator37@asyncio.coroutine38def go(loop):39    scheduler = AsyncIOScheduler(loop)40    xs = rx.from_([x for x in range(10)], scheduler=scheduler)41    gen = xs.pipe(to_async_generator())42    # Wish we could write something like:43    # ys = (x for x in yield from gen())44    while True:45        x = yield from gen()46        if x is None:47            break48        print(x)49def main():50    loop = asyncio.get_event_loop()51    loop.run_until_complete(go(loop))52if __name__ == '__main__':...

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