something.py

class ClickRecorder():
    
    data = {}
    current_selector = None
    current_coord = None
    current_url = None
    
    def addClick(self, sel, coordpair):
        self.current_selector = sel
        self.current_coord = coordpair
        self.current_url = None
        
    def addURL(self, url):
        self.current_url = url
        if url not in self.data:
            self.data[url] = {}
        if self.current_selector not in self.data[url]:
            self.data[url][self.current_selector] = []
        self.data[url][self.current_selector].append(self.current_coord)
        self.current_selector = None
        self.current_coord = None
    
     
class NavListener(AbstractEventListener):
    
    prevent_navigation = True
    click_recorder = None
    def __init__(self):
        self.click_recorder = ClickRecorder()
        
    def before_navigate_to(self, url, driver):
        print "BEFORE"
        self.nav_attempted = False
        if self.prevent_navigation:
            driver.execute_script("window.stop();")
        self.click_recorder.addURL(url)
        print "DONE"
####Check the code here for the calls, the above are for reference
def detect_advertisements(pg_url):
####cut a large bit of code out here, assume variables exist
        chrome_options = ChromeOptions()
        selenium_logger = logging.getLogger('selenium.webdriver.remote.remote_connection')
        selenium_logger.setLevel(logging.ERROR)
        ub_driver_base = webdriver.Chrome(executable_path=chromedrvr,chrome_options=chrome_options, service_args=["--log-path=./chrome.log"])
        nav_listener = NavListener()
        ub_driver = EventFiringWebDriver(ub_driver_base, nav_listener)
######another large cut
        actions = ActionChains(ub_driver)
        ub_driver.set_page_load_timeout(0.01)
        for dompath in clicks_relevant:
            print "#",dompath
            el = ub_driver.find_element_by_id(dompath)
            for cr in clicks_relevant[dompath]:
                nav_listener.click_recorder.addClick(dompath, cr)
                try:
                    #this is the line that should throw an error
                    #I'm trying to capture all page-change events without changing the page 
                    #this is for monitoring webpage advertisements
                    actions.move_to_element_with_offset(el, cr["clickX"], cr["clickY"]).click().perform()
                except:
                    
                    pass
                try:
                    alert = ub_driver.switch_to_alert()
                    alert.dismiss()
                except:
                    pass