Authenticate with GitHub from Python using the new device auth flow

auth.py

#!/usr/bin/env python3
#
# Implements the GitHub device auth flow described here:
# https://docs.github.com/en/free-pro-team@latest/developers/apps/authorizing-oauth-apps#device-flow

from urllib.parse import parse_qs
import urllib, requests, time, webbrowser, json

client_id ='a945f87ad537bfddb109'

# Kick off the headless device auth flow on github.com
url = 'https://github.com/login/device/code'
response = requests.post(url, data = {'client_id': client_id, 'scope': ''})
params = parse_qs(response.text)

YELLOW = '\033[93m'
END = '\033[0m'
print ("First copy your one-time code: "  + YELLOW + params['user_code'][0] + END)

time.sleep(1)
input("Then, press Enter to open %s in a browser..." % (params['verification_uri'][0]))
webbrowser.open(params['verification_uri'][0])
print()
print ("Waiting for authorization...", end='', flush=True)

# Poll for the user to finish the auth flow
interval = int(params['interval'][0]) + 1
while True:
    time.sleep(interval)
    print('.', end='', flush=True)
    poll_response = requests.post('https://github.com/login/oauth/access_token', 
        data = {'client_id': client_id, 
                'device_code': params['device_code'], 
                'grant_type': 'urn:ietf:params:oauth:grant-type:device_code'})
    poll_params = parse_qs(poll_response.text)
    if 'error' in poll_params:
        continue
    if 'access_token' in poll_params:
        print()
        access_token=poll_params['access_token'][0]
        print("Got access token: " + access_token)
        break
response = requests.get('https://api.github.com/user', 
    headers = {'Authorization': 'token ' + access_token})
r = json.loads(response.text)
login = r['login']
print("Authenticated with GitHub as %s!" % (login))