test2.py

import asyncio
import aiohttp

URLS = [
    "https://google.com",
    "https://github.com",
    "https://example.org",
]
DONE = {}

async def fetch(session, url):
    async with session.get(url) as resp:
        return url, len(await resp.text())

async def main():
    async with aiohttp.ClientSession() as session:
        print(dict(await asyncio.gather(*[asyncio.ensure_future(fetch(session, u)) for u in URLS])))

asyncio.get_event_loop().run_until_complete(main())