[Async downloader] Async file downloader #automation

downloader.py

import aiohttp
import asyncio


async def download(session, url, file):
    async with session.get(url) as res:
        with open(file, "wb") as f:
            f.write(await res.read())


async def main():
    links = [
        f"https://www.cs.cornell.edu/courses/cs4110/2020fa/lectures/slides{i:02}.pdf"
        for i in range(1, 36)
    ] + [
        f"https://www.cs.cornell.edu/courses/cs4110/2020fa/lectures/lecture{i:02}.pdf"
        for i in range(1, 31)
    ]
    async with aiohttp.ClientSession() as session:
        tasks = [
            download(session, link, link.split("/")[-1]) for i, link in enumerate(links)
        ]
        await asyncio.gather(*tasks)


asyncio.run(main())