Selenium Alert Handling Python

Question

So I am using Selenium to simply go to a given list of websites and take a screenshot of them. However I have run into some having alerts and some do not. I am looking to do something along the lines of if alert then this else keep moving.

Here is my current code

from selenium import webdriver
import pandas as pd
import time

path = "C:/Users/dge/Desktop/Database/NewPythonProject/html Grabber/Output/Pics/"
df = pd.DataFrame()
df = df.append(pd.read_csv('crime.csv'), ignore_index=True)
driver = webdriver.Chrome('C:/Users/dge/Desktop/Database/NewPythonProject/html Grabber/chromedriver.exe')

for i in df.index:
    print(i)
    pic = path + df['site'][i] + '.png'
    driver.get('http://' + df['site'][i])
    time.sleep(5)
    driver.save_screenshot(pic)

I've seen this but just not sure how to add it in the loop

driver.find_element_by_id('').click()
alert = driver.switch_to_alert()

The best way to put this may be to say ignore any errors and continue on through my list of urls.

put it in any place in loop and see what will happen. And when you get error message then read it and try to resolve it. Shortly: first try, next check in Google, finally ask question. — furas
– furas, Commented Mar 5, 2020 at 15:47
@furas Thank you for that piece of advice, however that is exactly what I am asking for help with. I can't think of how to involve this in the loop — Pittsie
– Pittsie, Commented Mar 5, 2020 at 17:02
first simply copy and paste code to loop and run it. And if it will not work then you at least get error message which you can use to search in Google. And then you can also test code in different place or in different order. This way we learn it - by testing code in different configurations. — furas
– furas, Commented Mar 5, 2020 at 17:03
BTW: you could add url for page which shows alert and we would have page for testing code. — furas
– furas, Commented Mar 5, 2020 at 17:08
Does this answer your question? Check if any alert exists using selenium with python — Greg Burghardt
– Greg Burghardt, Commented Mar 5, 2020 at 17:30

furas · Accepted Answer · 2020-03-07 05:36:24Z

JavaScript can create alert(), confirm() or prompt()

To press button OK

driver.switch_to.alert.accept()  # press OK

To press button CANCEL (which exists only in confirm() and prompt())

driver.switch_to.alert.dismiss()  # press CANCEL

To put some text in prompt() before accepting it

prompt = driver.switch_to.alert
prompt.send_keys('foo bar')
prompt.accept()

There is no function to check if alert is displayed
but you can put it in try/except to catch error when there is no alert.

try:
    driver.switch_to.alert.accept()  # press OK
    #driver.switch_to.alert.dismiss()  # press CANCEL
except Exception as ex:
    print('Exception:', ex)

Minimal working example.

Because I don't know page which displays alert so I use execute_script to display it.

from selenium import webdriver
import time

#driver = webdriver.Firefox()
driver = webdriver.Chrome()

driver.get('http://google.com')

# --- test when there is alert ---

driver.execute_script("console.log('alert: ' + alert('Hello World!'))")
#driver.execute_script("console.log('alert: ' + confirm('Hello World!'))")
#driver.execute_script("console.log('alert: ' + prompt('Hello World!'))")
time.sleep(2)

try:
    driver.switch_to.alert.accept()  # press OK
    #driver.switch_to.alert.dismiss()  # press CANCEL
except Exception as ex:
    print('Exception:', ex)

# --- test when there is no alert ---

try:
    driver.switch_to.alert.accept()  # press OK
    #driver.switch_to.alert.dismiss()  # press CANCEL
except Exception as ex:
    print('Exception:', ex)

# ---

driver.save_screenshot('image.png')
driver.close()

BTW: if you want to first try to press CANCEL and when it doesn't work then press OK

try:
    driver.switch_to.alert.dismiss()  # press CANCEL
except Exception as ex:
    print('Exception:', ex)
    try:
        driver.switch_to.alert.accept()   # press OK
    except Exception as ex:
        print('Exception:', ex)

BTW: different problem can be popup notifications or geolocation alerts

How to click Allow on Show Notifications popup using Selenium Webdriver

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