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Selenium + Python + UnexpectedAlertPresentException: Dealing with annoying alerts

By Viksto
Handling UnexpectedAlertPresentException 

 Alerts who hates them? I Do! Who doesn't hate an annoying alert causing your tests / scraping job to fail?






UnexpectedAlertPresentException

I must say they are pretty much on point on the Unexpected part! Fortunately, there are easy ways to mitigate the issue.

1. Disable alerts completely:



driver.execute_script('window.alert = function(){};');














execute this script just before where you anticipate the alert and you're golden.









2. You want to see the alert text but not disturb the execution flow.










driver.execute_script('window.alert = console.info;');














Now the alerts have been redirected to the console and you don't have to worry about them. (Unless you have to - then you'd have to monitor the console)









3. You know exactly when it comes and want to accept the alert and move on.












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from selenium import webdriver
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.common.exceptions import TimeoutException

try:
    WebDriverWait(browser, 3).until(EC.alert_is_present(),
                                   'Timed out waiting for popup to appear.')
    alert = browser.switch_to.alert
    alert_text = alert.text
    alert.accept()
    print("alert accepted, it was saying: ", alert_text)
except TimeoutException:
    print("No alert caught")




















Now What?











You have been just exposed to a new universe of opportunity! There are no limits to what you could do with web scraping. Most startups and existing big businesses do it, and it's not going out of business.

You can build apps around real customer data, get new acquisitions validate your users automate routine tasks list goes on.

You can further explore our blog for interesting reads OR - you can contact us to learn a bit more over a FREE personal Skype coaching session. Just click on "Leave a message" and reach out to us. We get a lot of volume these days so FREE Sessions won't be here for a long time, Grab this opportunity while you can!









































Comments









  1. TravisDecember 9, 2018 at 8:55 PM
    Viksto, Thats a great one! I am going to implement this as soon I can.
    ReplyDelete











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