异步编程：小脚本

# __author: "ZXYang"
# date: 2020/12/22


"""
[[async]]
async def:  【异步函数】
async with: 【异步上下文】
            对象必须符合异步上下文管理器：
            __aenter__
            __aexit__

async for:  【异步迭代】
            被迭代对象必须要实现异步迭代协议
            __aiter__
            __anext__

[[await]]
await: 后边只能跟可迭代对象：异步任务，协程, Future，asyncio.sleep()

"""


import asyncio


async def work1():
    for i in range(3):
        print('___work1___')
        await asyncio.sleep(1)


async def work2():
    for i in range(3):
        print('___work2___')
        await asyncio.sleep(1)


async def main():
    # task1 = asyncio.create_task(work1())
    # task2 = asyncio.create_task(work2())
    # await task1
    # await task2
    await asyncio.gather(
        work1(),
        work2(),
        work2(),
        work2(),
    )


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




    # res1 = work1()
    # res2 = work2()
    # asyncio.run(res1)
    # asyncio.run(res2)