python async await example

async-example.py

import asyncio
from time import time

async def slow_a():
    print("a start")
    await asyncio.sleep(2.5)
    print("a end")

async def slow_b():
    print("b start")
    await asyncio.sleep(2.0)
    print("b end")


async def main():
    start = time()
    print("start main")
    t1 = asyncio.create_task(slow_a())
    t2 = asyncio.create_task(slow_b())
    await t1
    await t2
    print("end main")
    print(time() - start)


if __name__ == '__main__':
    asyncio.run(main())