lesson03_as_completed.py

# SuperFastPython.com
# example of getting coroutine results as completed
from random import random
import asyncio

# coroutine to execute in a new task
async def task_coro(arg):
 # generate a random value between 0 and 1
 value = random()
 # suspend for a moment
 await asyncio.sleep(value)
 # return the result
 return arg * value

# main coroutine
async def main():
 # create many coroutines
 coros = [task_coro(i) for i in range(10)]
 # get results as coroutines are completed
 for coro in asyncio.as_completed(coros):
 # get the result from the next task to complete
 result = await coro
 # report the result
 print(f'>got {result}')

# start the asyncio program
asyncio.run(main())