Asyncio warning deprecationwarning: there is no current event loop

The following is a code snippet for asynchronous web page fetching ：

import asyncio
import aiohttp


async def fetch_page(url):
    async with aiohttp.ClientSession() as session:
        async with session.get(url) as response:
            return response.status

tasks = [fetch_page('http://books.toscrape.com') for i in range(50)]

loop = asyncio.get_event_loop()

loop.run_until_complete(asyncio.gather(*tasks))

At present Python Version is 3.10.5, Run the above code , The following warning will appear ：

DeprecationWarning: There is no current event loop
  loop = asyncio.get_event_loop()
DeprecationWarning: There is no current event loop
  loop.run_until_complete(asyncio.gather(*tasks))

All in all asyncio.get_event_loop(), asyncio.gather(*tasks) Neither function can be used .

Code changed to use asyncio.run() , test ok：

import asyncio
import aiohttp


async def fetch_page(url):
    async with aiohttp.ClientSession() as session:
        async with session.get(url) as response:
            print(response.status)


async def main():
    tasks = [fetch_page('https://quotes.toscrape.com/') for i in range(50)]
    await asyncio.gather(*tasks)  # argument unpacking: (tasks[0], tasks[1], ... tasks[49])

asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())
asyncio.run(main())

The following statement must be added ,

# important
asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())

otherwise windows System for https Website , There will be errors

RuntimeError: Event loop is closed