t.py

import requests3
import trio

session = requests3.AsyncSession()


async def main():

    async def request():
        r = await session.get('http://127.0.0.1:8000/uuid', stream=False)
        print(await r.json())
        return r

    for i in range(16):
        async with trio.open_nursery() as nursery:
            for i in range(512):
                nursery.start_soon(request)

    print('done!')


trio.run(main)