出现这个错误：DeprecationWarning: There is no current event loop

代码如下：

import asyncio
import aiohttp
from lxml import etree

urls = [
    'http://127.0.0.1:5000/bobo',
    'http://127.0.0.1:5000/jay',
    'http://127.0.0.1:5000/tom',
]

async def get_request(url):
    async with  aiohttp.ClientSession() as sess:
        async with await sess.get(url=url) as response:
            page_text = await response.text()
            return page_text
def parse(t):
    page_text = t.result()
    et = etree.HTML(page_text)
    a = et.xpath('//a[@id="feng"]/@href')[0]
    print(a)

if __name__ == '__main__':
    tasks = []
    for url in urls:
        c = get_request(url)
        task = asyncio.ensure_future(c)
        task.add_done_callback(parse)
        tasks.append(task)
    loop = asyncio.get_event_loop()
    loop.run_until_complete(asyncio.wait(tasks))

运行结果及报错内容

DeprecationWarning: There is no current event loop task = asyncio.ensure_future(c)
DeprecationWarning: There is no current event loop loop = asyncio.get_event_loop()

我的解答思路和尝试过的方法

将下面一句:
loop = asyncio.get_event_loop()
替换成下面两句即可
loop = asyncio.new_event_loop()
asyncio.set_event_loop(loop)
依然不行
请各位能人志士帮个忙