Python Asyncio - Pythonic Way Of Waiting Until Condition Satisfied

I need to wait until a certain condition/equation becomes True in a asynchronous function in python. Basically it is a flag variable which would be flagged by a coroutine running i

Solution 1:

Using of asyncio.Event is quite straightforward. Sample below.

Note: Event should be created from inside coroutine for correct work.

import asyncio


async def bg_tsk(flag):
    await asyncio.sleep(3)
    flag.set()


async def waiter():
    flag = asyncio.Event()
    asyncio.create_task(bg_tsk(flag))
    await flag.wait()
    print("After waiting")


asyncio.run(waiter())