>>> import favicon
>>> icons = favicon.get('https://www.python.org/')
Icon(url='https://www.python.org/static/apple-touch-icon-144x144-precomposed.png', width=144, height=144, format='png')
Icon(url='https://www.python.org/static/apple-touch-icon-114x114-precomposed.png', width=114, height=114, format='png')
Icon(url='https://www.python.org/static/apple-touch-icon-72x72-precomposed.png', width=72, height=72, format='png')
Icon(url='https://www.python.org/static/apple-touch-icon-precomposed.png', width=0, height=0, format='png')
Icon(url='https://www.python.org/static/favicon.ico', width=0, height=0, format='ico')

import requests
import favicon

icons = favicon.get('https://www.python.org/')
icon = icons[0]

response = requests.get(icon.url, stream=True)
with open('/tmp/python-favicon.{}'.format(icon.format), 'wb') as image:
    for chunk in response.iter_content(1024):
        image.write(chunk)

# /tmp/python-favicon.png

import favicon

user_agent = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.47 Safari/537.36'
headers = {'User-Agent': user_agent}
favicon.get('https://www.python.org/', headers=headers, timeout=2)