Python 2/3 Asyncio in 2019

I have to keep my application compatible with Python 2 and 3 at the same time.

I have some code like the following that I want to be able to asynchronously call a function and then wait for all my futures to be resolved.

Code:

import requests

# This would return a future
def get_xhr(url):
    return requests.get('https://www.{}.com'.format(url))

# This would return an array of futures
def get_search_engines():
    urls = ['google', 'yahoo', 'bing']
    return [get_xhr(url) for url in urls]


# Here I want to wait for all the futures to be resolved
get_search_engines()

print('All requests are done')

Asyncio async/await seems only compatible with Python 3.

What is the best way to be able to run functions async thats compatible for both python 2/3?