aio-throttle-to-next-second 
Throttler for asyncio Python that throttles to the next whole second, as reported by time.time(). This is useful to force an order on requests to a service that uses a "latest timestamp wins" strategy, such as S3.
Installation
pip install aio-throttle-to-next-secondUsage
Create a shared Throttler, with no arguments
from aio_throttle_to_next_second import Throttler
throttler = Throttler()and then just before the piece(s) of code to be throttled, call this and await its result.
await throttler()
# Each execution reaching this line will reach this line at a different secondExample: multiple tasks throttled
import asyncio
import time
from aio_throttle_to_next_second import Throttler
async def main():
throttler = Throttler()
await asyncio.gather(*[
worker(throttler) for _ in range(10)
])
async def worker(throttler):
await throttler()
# Each print will show a distinct second, though all workers started together
print(int(time.time()))
loop = asyncio.get_event_loop()
loop.run_until_complete(main())
loop.close()Example: single task throttled
import asyncio
import random
import time
from aio_throttle_to_next_second import Throttler
async def main():
throttler = Throttler()
for _ in range(10):
await throttler()
# Each print will show a distinct second, though there is a random sleep
print(int(time.time()))
await asyncio.sleep(random.random())
loop = asyncio.get_event_loop()
loop.run_until_complete(main())
loop.close()