async_programming_in_python_example.py

print("======gevent")
import gevent.monkey
from urllib.request import urlopen
gevent.monkey.patch_all()
urls = ['http://www.google.com', 'http://www.yandex.ru', 'http://www.python.org']

def print_head(url):
    print('Starting {}'.format(url))
    data = urlopen(url).read()
    print('{}: {} bytes: {}'.format(url, len(data), data[:15]))

jobs = [gevent.spawn(print_head, _url) for _url in urls]

gevent.wait(jobs)


print("======asyncio")
import asyncio
import aiohttp

urls = ['http://www.google.com', 'http://www.yandex.ru', 'http://www.python.org']

@asyncio.coroutine
def call_url(url):
    print('Starting {}'.format(url))
    response = yield from aiohttp.ClientSession().get(url)
    data = yield from response.text()
    print('{}: {} bytes: {}'.format(url, len(data), data[:15]))
    return data

futures = [call_url(url) for url in urls]

loop = asyncio.get_event_loop()
loop.run_until_complete(asyncio.wait(futures))


print("======Async и Await")

import asyncio
import aiohttp

urls = ['http://www.google.com', 'http://www.yandex.ru', 'http://www.python.org']

async def call_url(url):
    print('Starting {}'.format(url))
    response = await aiohttp.ClientSession().get(url)
    data = await response.text()
    print('{}: {} bytes: {}'.format(url, len(data), data[0:15]))
    return data

futures = [call_url(url) for url in urls]

loop = asyncio.get_event_loop()
loop.run_until_complete(asyncio.wait(futures))