async_example_tasks.py

import asyncio
import time

async def say_after(delay, what):
    await asyncio.sleep(delay)
    print(what)

async def use_await():
    await say_after(3, 'world')
    await say_after(2, 'hello')
    print(f"use_await finished at t={time.time() - start} seconds")

async def use_tasks():
    task_a = asyncio.create_task(say_after(3, 'world'))
    task_b = asyncio.create_task(say_after(2, 'hello'))
    await task_a
    await task_b
    print(f"use_tasks finished at t={time.time() - start} seconds")

start = time.time()
asyncio.run(use_await())  # Prints 'world hello' in 5 seconds
asyncio.run(use_tasks())  # Prints 'hello world' in 3 seconds