how do you set autoconfigurl in python?

Using Python and Selenium to set the proxyAutoconfigUrl you can use the following solution:

from selenium.webdriver.common.proxy import Proxy


prox = Proxy()
prox.proxyAutoconfigUrl = "http://wpad/wpad.dat"
capabilities = webdriver.DesiredCapabilities.CHROME.copy()
prox.add_to_capabilities(capabilities)