# __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
import time
import aiohttp


async def request_url(url):
    """异步请求方法"""
    async with aiohttp.ClientSession() as session:
        async with session.get(url) as response:
            res = await response.read()
            print(response.status)


async def main():
    cos = []
    for i in range(10):
        cos.append(request_url("http://www.baidu.com"))
    await asyncio.gather(*cos)


if __name__ == '__main__':
    s_time = time.time()
    asyncio.run(main())
    e_time = time.time()
    print(e_time - s_time)