Making requests with asyncio and aiohttp

asyncio_aiohttp_requests.py

import aiohttp
import asyncio


NUMBERS = range(12)
URL = 'http://httpbin.org/get?a={}'


async def fetch_async(a):
    async with aiohttp.ClientSession() as session:
        async with session.request('GET', URL.format(a)) as response:
            data = await response.json()
            return data['args']['a']


event_loop = asyncio.get_event_loop()
tasks = [fetch_async(num) for num in NUMBERS]
results = event_loop.run_until_complete(asyncio.gather(*tasks))

for num, result in zip(NUMBERS, results):
    print('fetch({}) = {}'.format(num, result))