aioratelimits

Client rate limiter. It enqueues function calls and run them as leaky bucket to ensure specified rates.

Implementation

Leaky bucket. We have one queue for requests and count number of workers. Each worker can handle one request per delay seconds

Install

pip install aioratelimits

Use

The following code prints not more than 2 lines per second.

import asyncio
from aioratelimits import RateLimiter


async def critical_resource(i: int):
    print('request:', i)


async def main():
    async with RateLimiter(count=2, delay=1) as limiter:
        await asyncio.gather(*(
            limiter.run(critical_resource(i))
            for i in range(10)
        ))


asyncio.run(main())

Arguments to RateLimiter:

• count - how many calls can we do in the specified interval
• delay - the interval in seconds