异步请求

先安装nest_asyncio

pip install nest_asyncio

import asyncio
from aiohttp import ClientSession
import time
import nest_asyncio

nest_asyncio.apply()

async def hello():
    url = 'https://www.jianshu.com/u'
    data = {'slength':1.0,'swidth':1.0}
    async with ClientSession() as session:
        async with session.post(url=url,json=data) as response:
            response = await response.read()
    return response

#设置并发数量
tasks = [asyncio.ensure_future(hello()) for _ in range(1000)]
start = time.clock()
loop = asyncio.get_event_loop()
loop.run_until_complete(asyncio.wait(tasks))
end = time.clock()
print('耗时%d秒' %(end-start))