I want to assert all ids in the list with for loop, my code is not working:

list = ["'block-views-news_of_the_day-block_1'", "'views_slideshow_singleframe_main_carousal_new_block-block_1-2'",
            "'const-cont-home","block-block-13'", "'block-block-58'"]

for x in list:


Traceback (most recent call last): File "C:\Users\xxxxx\xxxxx\Selenium Scripts\xxxr\TestCases.py", line 50, in test_flush_cache self.assertTrue(self.driver.find_element_by_id(x))
File "C:\Program Files (x86)\Python35-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 266, in find_element_by_id return self.find_element(by=By.ID, value=id_)
File "C:\Program Files (x86)\Python35-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 744, in find_element {'using': by, 'value': value})['value']
File "C:\Program Files (x86)\Python35-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 233, in execute self.error_handler.check_response(response)
File "C:\Program Files (x86)\Python35-32\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 194, in check_response raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.NoSuchElementException: Message: Unable to locate element: {"method":"id","selector":"'block-views-news_of_the_day-block_1'"}

  • where its get failed?Can you share error pls Aug 17, 2016 at 10:02
  • Error updated above Aug 17, 2016 at 10:15
  • Be careful of what assert are you are using, check what find_element_by_id returns, if returns true or object if the element is found.
    – lauda
    Aug 21, 2016 at 15:44

2 Answers 2


Using single quotes inside of double quotes seems weird/wrong. So first thing would be to remove those.

Then if one of the elements from the list doest exist you will get a NoSuchElementException. If you want the test to fail instead of just having an exception in your script you should handle this exception. I would write this test like this:

from selenium.common.exceptions import NoSuchElementException

ids = [

for id in ids: 
    except NoSuchElementException:

In this case test will fail when one element is missing from the page and wont check for others. If you want to keep checking for other elements you need to have a list where you collect missing elements instead of self.fail().


Try to remove the double or single quotes, something like:

list = ['id1', 'id2', 'id3']


list = ["id1", "id2", "id3"]

As you see in the last line it includes the single quotes as part of the id and that results in an error.

  • Thanks for the Code can you Help with a Code for If you want to keep checking for other elements you need to have a list where you collect missing elements instead of self.fail(). also as it is not Clear from Context
    – vdfsgdfv
    Aug 2, 2021 at 13:46
  • You need to use a concept like soft assert, find an assert library that has this or implement it yourself by checking in with an if and add it to a fail list if false.. and at the end assert that the list is empty.
    – lauda
    Sep 22, 2021 at 7:59

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