异步协程

import asyncio
import aiohttp

async def get(url):
    headers = {
        'user-agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36'
    }
    session = aiohttp.ClientSession()
    response = await session.get(url,headers=headers)
    result = await response.text()
    await session.close()
    return result

async def request(url):
    result = await get(url)

tasks = []
    for i in range(page, page + 19):
        url = 
        task_signal = asyncio.ensure_future(request(url))
        tasks.append(task_signal)

    print(tasks)
    loop = asyncio.get_event_loop()
    loop.run_until_complete(asyncio.wait(tasks))