Hijack an existing webdriver session and keep it running in the background while you debug

ghost_session.py

#!/usr/bin/env python
# ghost_session.py
# usage: python ghost_session.py <running_session_id> 

from os import environ
from sys import argv
from time import sleep
from selenium import webdriver

# get the session id you want to take over from command line argument
running_session_id = argv[1]
print("session:" + running_session_id)

# get sauce labs credentials from environment variables
username = environ["SAUCE_USERNAME"]
accesskey = environ["SAUCE_ACCESS_KEY"]

# default command executor URL and capabilities for a remote session
url = "http://" + username + ":" + accesskey + "@" + "ondemand.saucelabs.com/wd/hub"
caps = { "browserName": "Chrome", "platform": "Windows 10", "name": "ghost session" }

# create an initial session that will be discarded
driver = webdriver.Remote(url, caps)
old_session_id = driver.session_id

# this will now send requests to the other session
driver.session_id = running_session_id

# keep session alive with non-intrusive webdriver requests
while True:
	print(driver.title)
	sleep(30)