How to get access to a page's "Inspect Element" code without opening a new page

Question

I am trying to use python to get access to the inspect element code from a page that i have already open.

I tried using selenium

import selenium

driver = selenium.webdriver.Chrome()

driver.get("mywebsite")
html = driver.execute_script("return document.documentElement.innerHTML;")

It works, giving me the code, but it opens the a new chrome page.

Thanks.