异步下载添加进度条tqdm

   #正常异步下载

     async with aiohttp.ClientSession() as session:

        tasks = [asyncio.create_task(fetch(session, url,filename)) for url in imgs]

        await asyncio.wait(tasks)

   

     async with aiohttp.ClientSession() as session:

        tasks = [asyncio.create_task(fetch(session, url, filename)) for url in imgs]

        # 使用 tqdm 的异步版本

        for f in tqdm(asyncio.as_completed(tasks), total=len(tasks)):

            await f