Use a single aiohttp session to make multiple HTTP requests concurrently using asyncio

req.py

import asyncio
from aiohttp import ClientSession

async def fetch(url, session):
    async with session.get(url) as response:
        return await response.json()

async def main():
    url = 'http://localhost:8000'

    async with ClientSession() as session:
        tasks = (fetch(f'{url}/{i}', session) for i in range(1000))
        responses = await asyncio.gather(*tasks)
        print(responses)

if __name__ == '__main__':
    loop = asyncio.get_event_loop()
    loop.run_until_complete(main())