aiohttp_download.py

from aiohttp import ClientSession
from asyncio import run, gather, create_task

url_template = 'https://jsonplaceholder.typicode.com/posts/{post_id}'
worker_count = 10


async def main():
    post_ids = list(range(1, 101))
    titles = {}
    async with ClientSession() as session:
        tasks = []
        for _ in range(worker_count):
            tasks.append(create_task(retrieve_worker(session, post_ids, titles)))
        await gather(*tasks)
    print(titles)


async def retrieve_worker(session, post_ids, titles):
    while post_ids:
        post_id = post_ids.pop(0)
        titles[post_id] = await retrieve_title(session, post_id)


async def retrieve_title(session, post_id):
    url = url_template.format(post_id=post_id)
    print('Downloading', url)
    async with session.get(url) as resp:
        resp.raise_for_status()
        data = await resp.json()
        print('Downloaded', url)
        return data['title']


if __name__ == '__main__':
    run(main())

output.txt

Downloading https://jsonplaceholder.typicode.com/posts/1
Downloading https://jsonplaceholder.typicode.com/posts/2
Downloading https://jsonplaceholder.typicode.com/posts/3
Downloading https://jsonplaceholder.typicode.com/posts/4
Downloading https://jsonplaceholder.typicode.com/posts/5
Downloading https://jsonplaceholder.typicode.com/posts/6
Downloading https://jsonplaceholder.typicode.com/posts/7
Downloading https://jsonplaceholder.typicode.com/posts/8
Downloading https://jsonplaceholder.typicode.com/posts/9
Downloading https://jsonplaceholder.typicode.com/posts/10
Downloaded https://jsonplaceholder.typicode.com/posts/2
Downloading https://jsonplaceholder.typicode.com/posts/11
Downloaded https://jsonplaceholder.typicode.com/posts/7
Downloading https://jsonplaceholder.typicode.com/posts/12
Downloaded https://jsonplaceholder.typicode.com/posts/3
Downloading https://jsonplaceholder.typicode.com/posts/13
Downloaded https://jsonplaceholder.typicode.com/posts/5
Downloading https://jsonplaceholder.typicode.com/posts/14
Downloaded https://jsonplaceholder.typicode.com/posts/10
Downloading https://jsonplaceholder.typicode.com/posts/15
Downloaded https://jsonplaceholder.typicode.com/posts/4
Downloading https://jsonplaceholder.typicode.com/posts/16
Downloaded https://jsonplaceholder.typicode.com/posts/6
Downloading https://jsonplaceholder.typicode.com/posts/17
Downloaded https://jsonplaceholder.typicode.com/posts/1
Downloading https://jsonplaceholder.typicode.com/posts/18
Downloaded https://jsonplaceholder.typicode.com/posts/8
Downloading https://jsonplaceholder.typicode.com/posts/19
Downloaded https://jsonplaceholder.typicode.com/posts/11
Downloading https://jsonplaceholder.typicode.com/posts/20
Downloaded https://jsonplaceholder.typicode.com/posts/12
Downloading https://jsonplaceholder.typicode.com/posts/21
Downloaded https://jsonplaceholder.typicode.com/posts/13
Downloading https://jsonplaceholder.typicode.com/posts/22
Downloaded https://jsonplaceholder.typicode.com/posts/14
Downloading https://jsonplaceholder.typicode.com/posts/23
Downloaded https://jsonplaceholder.typicode.com/posts/15
Downloading https://jsonplaceholder.typicode.com/posts/24
Downloaded https://jsonplaceholder.typicode.com/posts/16
Downloading https://jsonplaceholder.typicode.com/posts/25
Downloaded https://jsonplaceholder.typicode.com/posts/17
Downloading https://jsonplaceholder.typicode.com/posts/26
Downloaded https://jsonplaceholder.typicode.com/posts/18
Downloading https://jsonplaceholder.typicode.com/posts/27
Downloaded https://jsonplaceholder.typicode.com/posts/19
Downloading https://jsonplaceholder.typicode.com/posts/28
Downloaded https://jsonplaceholder.typicode.com/posts/20
Downloading https://jsonplaceholder.typicode.com/posts/29
Downloaded https://jsonplaceholder.typicode.com/posts/21
Downloading https://jsonplaceholder.typicode.com/posts/30
Downloaded https://jsonplaceholder.typicode.com/posts/22
Downloading https://jsonplaceholder.typicode.com/posts/31
Downloaded https://jsonplaceholder.typicode.com/posts/23
Downloading https://jsonplaceholder.typicode.com/posts/32
Downloaded https://jsonplaceholder.typicode.com/posts/24
Downloading https://jsonplaceholder.typicode.com/posts/33
Downloaded https://jsonplaceholder.typicode.com/posts/25
Downloading https://jsonplaceholder.typicode.com/posts/34
Downloaded https://jsonplaceholder.typicode.com/posts/28
Downloading https://jsonplaceholder.typicode.com/posts/35
Downloaded https://jsonplaceholder.typicode.com/posts/27
Downloading https://jsonplaceholder.typicode.com/posts/36
Downloaded https://jsonplaceholder.typicode.com/posts/26
Downloading https://jsonplaceholder.typicode.com/posts/37
Downloaded https://jsonplaceholder.typicode.com/posts/29
Downloading https://jsonplaceholder.typicode.com/posts/38
Downloaded https://jsonplaceholder.typicode.com/posts/30
Downloading https://jsonplaceholder.typicode.com/posts/39
Downloaded https://jsonplaceholder.typicode.com/posts/31
Downloading https://jsonplaceholder.typicode.com/posts/40
Downloaded https://jsonplaceholder.typicode.com/posts/32
Downloading https://jsonplaceholder.typicode.com/posts/41
Downloaded https://jsonplaceholder.typicode.com/posts/33
Downloading https://jsonplaceholder.typicode.com/posts/42
Downloaded https://jsonplaceholder.typicode.com/posts/34
Downloading https://jsonplaceholder.typicode.com/posts/43
Downloaded https://jsonplaceholder.typicode.com/posts/35
Downloading https://jsonplaceholder.typicode.com/posts/44
Downloaded https://jsonplaceholder.typicode.com/posts/36
Downloading https://jsonplaceholder.typicode.com/posts/45
Downloaded https://jsonplaceholder.typicode.com/posts/37
Downloading https://jsonplaceholder.typicode.com/posts/46
Downloaded https://jsonplaceholder.typicode.com/posts/38
Downloading https://jsonplaceholder.typicode.com/posts/47
Downloaded https://jsonplaceholder.typicode.com/posts/40
Downloading https://jsonplaceholder.typicode.com/posts/48
Downloaded https://jsonplaceholder.typicode.com/posts/39
Downloading https://jsonplaceholder.typicode.com/posts/49
Downloaded https://jsonplaceholder.typicode.com/posts/42
Downloading https://jsonplaceholder.typicode.com/posts/50
Downloaded https://jsonplaceholder.typicode.com/posts/41
Downloading https://jsonplaceholder.typicode.com/posts/51
Downloaded https://jsonplaceholder.typicode.com/posts/44
Downloading https://jsonplaceholder.typicode.com/posts/52
Downloaded https://jsonplaceholder.typicode.com/posts/45
Downloading https://jsonplaceholder.typicode.com/posts/53
Downloaded https://jsonplaceholder.typicode.com/posts/46
Downloading https://jsonplaceholder.typicode.com/posts/54
Downloaded https://jsonplaceholder.typicode.com/posts/43
Downloading https://jsonplaceholder.typicode.com/posts/55
Downloaded https://jsonplaceholder.typicode.com/posts/47
Downloading https://jsonplaceholder.typicode.com/posts/56
Downloaded https://jsonplaceholder.typicode.com/posts/48
Downloading https://jsonplaceholder.typicode.com/posts/57
Downloaded https://jsonplaceholder.typicode.com/posts/49
Downloading https://jsonplaceholder.typicode.com/posts/58
Downloaded https://jsonplaceholder.typicode.com/posts/50
Downloading https://jsonplaceholder.typicode.com/posts/59
Downloaded https://jsonplaceholder.typicode.com/posts/52
Downloading https://jsonplaceholder.typicode.com/posts/60
Downloaded https://jsonplaceholder.typicode.com/posts/51
Downloading https://jsonplaceholder.typicode.com/posts/61
Downloaded https://jsonplaceholder.typicode.com/posts/53
Downloading https://jsonplaceholder.typicode.com/posts/62
Downloaded https://jsonplaceholder.typicode.com/posts/54
Downloading https://jsonplaceholder.typicode.com/posts/63
Downloaded https://jsonplaceholder.typicode.com/posts/55
Downloading https://jsonplaceholder.typicode.com/posts/64
Downloaded https://jsonplaceholder.typicode.com/posts/9
Downloading https://jsonplaceholder.typicode.com/posts/65
Downloaded https://jsonplaceholder.typicode.com/posts/56
Downloading https://jsonplaceholder.typicode.com/posts/66
Downloaded https://jsonplaceholder.typicode.com/posts/58
Downloading https://jsonplaceholder.typicode.com/posts/67
Downloaded https://jsonplaceholder.typicode.com/posts/57
Downloading https://jsonplaceholder.typicode.com/posts/68
Downloaded https://jsonplaceholder.typicode.com/posts/59
Downloading https://jsonplaceholder.typicode.com/posts/69
Downloaded https://jsonplaceholder.typicode.com/posts/61
Downloading https://jsonplaceholder.typicode.com/posts/70
Downloaded https://jsonplaceholder.typicode.com/posts/60
Downloading https://jsonplaceholder.typicode.com/posts/71
Downloaded https://jsonplaceholder.typicode.com/posts/63
Downloading https://jsonplaceholder.typicode.com/posts/72
Downloaded https://jsonplaceholder.typicode.com/posts/64
Downloading https://jsonplaceholder.typicode.com/posts/73
Downloaded https://jsonplaceholder.typicode.com/posts/62
Downloading https://jsonplaceholder.typicode.com/posts/74
Downloaded https://jsonplaceholder.typicode.com/posts/65
Downloading https://jsonplaceholder.typicode.com/posts/75
Downloaded https://jsonplaceholder.typicode.com/posts/66
Downloading https://jsonplaceholder.typicode.com/posts/76
Downloaded https://jsonplaceholder.typicode.com/posts/67
Downloading https://jsonplaceholder.typicode.com/posts/77
Downloaded https://jsonplaceholder.typicode.com/posts/69
Downloading https://jsonplaceholder.typicode.com/posts/78
Downloaded https://jsonplaceholder.typicode.com/posts/70
Downloading https://jsonplaceholder.typicode.com/posts/79
Downloaded https://jsonplaceholder.typicode.com/posts/71
Downloading https://jsonplaceholder.typicode.com/posts/80
Downloaded https://jsonplaceholder.typicode.com/posts/68
Downloading https://jsonplaceholder.typicode.com/posts/81
Downloaded https://jsonplaceholder.typicode.com/posts/73
Downloading https://jsonplaceholder.typicode.com/posts/82
Downloaded https://jsonplaceholder.typicode.com/posts/75
Downloading https://jsonplaceholder.typicode.com/posts/83
Downloaded https://jsonplaceholder.typicode.com/posts/76
Downloading https://jsonplaceholder.typicode.com/posts/84
Downloaded https://jsonplaceholder.typicode.com/posts/72
Downloading https://jsonplaceholder.typicode.com/posts/85
Downloaded https://jsonplaceholder.typicode.com/posts/74
Downloading https://jsonplaceholder.typicode.com/posts/86
Downloaded https://jsonplaceholder.typicode.com/posts/77
Downloading https://jsonplaceholder.typicode.com/posts/87
Downloaded https://jsonplaceholder.typicode.com/posts/78
Downloading https://jsonplaceholder.typicode.com/posts/88
Downloaded https://jsonplaceholder.typicode.com/posts/80
Downloading https://jsonplaceholder.typicode.com/posts/89
Downloaded https://jsonplaceholder.typicode.com/posts/79
Downloading https://jsonplaceholder.typicode.com/posts/90
Downloaded https://jsonplaceholder.typicode.com/posts/81
Downloading https://jsonplaceholder.typicode.com/posts/91
Downloaded https://jsonplaceholder.typicode.com/posts/82
Downloading https://jsonplaceholder.typicode.com/posts/92
Downloaded https://jsonplaceholder.typicode.com/posts/83
Downloading https://jsonplaceholder.typicode.com/posts/93
Downloaded https://jsonplaceholder.typicode.com/posts/84
Downloading https://jsonplaceholder.typicode.com/posts/94
Downloaded https://jsonplaceholder.typicode.com/posts/85
Downloading https://jsonplaceholder.typicode.com/posts/95
Downloaded https://jsonplaceholder.typicode.com/posts/86
Downloading https://jsonplaceholder.typicode.com/posts/96
Downloaded https://jsonplaceholder.typicode.com/posts/87
Downloading https://jsonplaceholder.typicode.com/posts/97
Downloaded https://jsonplaceholder.typicode.com/posts/88
Downloading https://jsonplaceholder.typicode.com/posts/98
Downloaded https://jsonplaceholder.typicode.com/posts/90
Downloading https://jsonplaceholder.typicode.com/posts/99
Downloaded https://jsonplaceholder.typicode.com/posts/91
Downloading https://jsonplaceholder.typicode.com/posts/100
Downloaded https://jsonplaceholder.typicode.com/posts/89
Downloaded https://jsonplaceholder.typicode.com/posts/92
Downloaded https://jsonplaceholder.typicode.com/posts/93
Downloaded https://jsonplaceholder.typicode.com/posts/95
Downloaded https://jsonplaceholder.typicode.com/posts/94
Downloaded https://jsonplaceholder.typicode.com/posts/97
Downloaded https://jsonplaceholder.typicode.com/posts/96
Downloaded https://jsonplaceholder.typicode.com/posts/98
Downloaded https://jsonplaceholder.typicode.com/posts/99
Downloaded https://jsonplaceholder.typicode.com/posts/100
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