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Python asyncio example

Jan 26, 2020

A simple python asyncio example which fetches urls concurrently.

import asyncio
import aiohttp


async def fetch(url):
    print(f'Fetching {url}')
    async with aiohttp.ClientSession() as session:
        async with session.get(url) as response:
            return {
                'url': url,
                'status': response.status,
            }

# Get the event loop
loop = asyncio.get_event_loop()

# Prepare coroutines.
requests = [fetch("https://github.com"),
            fetch("https://google.com"),
            fetch("http://httpbin.org/uuid"),
            fetch("http://httpbin.org/uuid")]

# Run the batch
responses = loop.run_until_complete(asyncio.gather(*requests))

# Examine responses
for resp in responses:
    print(resp)
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