asyncer VS aiometer

asyncer – Asyncer, async and await, focused on developer experience

class RateLimitTransport(httpx.AsyncHTTPTransport): def __init__(self, max_per_second: float = 5, **kwargs) -> None: """ Async HTTP transport with rate limit. Args: max_per_second: Maximum number of requests per second. Other args are passed to httpx.AsyncHTTPTransport. """ self.interval = 1 / max_per_second self.next_start_time = 0 super().__init__(**kwargs) async def notify_task_start(self): """ https://github.com/florimondmanca/aiometer/blob/358976e0b60bce29b9fe8c59807fafbad3e62cbc/src/aiometer/_impl/meters.py#L57 """ loop = asyncio.get_running_loop() while True: now = loop.time() next_start_time = max(self.next_start_time, now) until_now = next_start_time - now if until_now <= self.interval: break await asyncio.sleep(max(0, until_now - self.interval)) self.next_start_time = max(self.next_start_time, now) + self.interval async def handle_async_request(self, request: httpx.Request) -> httpx.Response: await self.notify_task_start() return await super().handle_async_request(request) async def __aenter__(self) -> Self: await self.notify_task_start() return await super().__aenter__() async def __aexit__(self, *args: Any) -> None: await super().__aexit__(*args)

I recommend anyone interested in this topic to take a look at aiometer.