lesson03_wait.py

# SuperFastPython.com
# example of waiting for all tasks to complete
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)
 # report the value
 print(f'>task {arg} done with {value}')

# main coroutine
async def main():
 # create many tasks
 tasks = [asyncio.create_task(task_coro(i))
 for i in range(10)]
 # wait for all tasks to complete
 _ = await asyncio.wait(tasks)
 # report results
 print('All done')

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