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python-aiohttpHow to get a response with Python Aiohttp?

Using Python Aiohttp, you can get a response from a web server by making an asynchronous HTTP request.

Example code

import aiohttp

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

async def main():
    async with aiohttp.ClientSession() as session:
        html = await fetch(session, 'http://python.org')
        print(html)

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

Output example

<!doctype html>
<!--[if lt IE 7]>   <html class="no-js ie6 lt-ie7 lt-ie8 lt-ie9">   <![endif]-->
<!--[if IE 7]>      <html class="no-js ie7 lt-ie8 lt-ie9">          <![endif]-->
<!--[if IE 8]>      <html class="no-js ie8 lt-ie9">                 <![endif]-->
<!--[if gt IE 8]><!--><html class="no-js" lang="en" dir="ltr">  <!--<![endif]-->

<head>
    ...

The code consists of the following parts:

Importing the aiohttp library: import aiohttp
Defining an asynchronous function to make the request: async def fetch(session, url)
Creating a ClientSession object: async with aiohttp.ClientSession() as session
Making the request and getting the response: html = await fetch(session, 'http://python.org')
Printing the response: print(html)
Running the asynchronous function: loop.run_until_complete(main())

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