SoFunction
Updated on 2025-03-02

Common error reporting problems and measures in Python Selenium

Common errors in Selenium mainly include the following types

This exception is thrown when Selenium cannot find an element in the DOM. This is usually because the element does not exist or the page is not fully loaded.

Solution:

  • Explicitly wait
  • Implicit waiting
  • The faster the slower the, the slower the faster. Faster means slower, that is, fast, so the slower the faster.
  • Or put the program on different computers on different networks, and multiple networks share the work,

This exception is thrown when waiting for a condition to be true (for example, waiting for element loading) exceeds the preset maximum value.

Solution:

  • This problem occurs if the element cannot be successfully waited for
  • It is very likely that the server thinks that the burden your client has brought to him is too great and it can't stand it. So
  • Take a break for a while, it's good and you're good

This exception is thrown when there is a problem in communicating with WebDriver. This may be because the WebDriver service is not started, or the network connection is interrupted.

Solution:

  • Overall a small problem
  • Check the browser version, check the browser driver version, check the network status, check the network proxy status
  • Update Selenium library?

This exception is thrown when the referenced element is no longer in the DOM. This is usually because the page has been refreshed or the element has been deleted.

Solution:

  • It is possible that the original URL has expired or expired, so it will automatically jump to a new web page. The new web page is often outside the established kneeling in the script program.
  • Check the current URL
  • Check the current tag title

This exception is thrown when trying to switch to a non-existent frame.   

Solution:

  • Try to relocate the frame tag from the root node in turn

This exception is thrown when trying to switch to a non-existent window.

Solution:

  • Re-get valid tabs and clean up extra tabs

This exception is thrown when trying to interact with an invisible element.

Solution:

  • Wait for the element to be visible
  • Use JavaScript or jQuery to change the visibility of elements
  • Scroll to element
  • Use ActionChains to simulate user interactions, such as mouse hover, drag and drop, etc.

This exception is thrown when trying to interact with an uninteractive element (for example, a disabled input box).

Solution:

  • Wait for the elements to become interactive
  • Check if the element is blocked by other elements
  • Use JavaScript to interact (if you have to force it)

Solution code example

1. Explicitly wait

from selenium import webdriver
from  import By
from  import WebDriverWait
from  import expected_conditions as EC
 
driver = ()
("http://somedomain/url_that_delays_loading")
try:
    element = WebDriverWait(driver, 10).until(
        EC.presence_of_element_located((, "myDynamicElement"))
    )
finally:
    ()

2. Implicit waiting

from selenium import webdriver
 
driver = ()
driver.implicitly_wait(10) # seconds
("http://somedomain/url_that_delays_loading")
myDynamicElement = driver.find_element_by_id("myDynamicElement")

3. Usetry/exceptStatement to captureNoSuchElementExceptionException, when an exception occurs, you can record error information or perform other recovery operations.

from selenium import webdriver
from  import NoSuchElementException
 
driver = ()
("http://somedomain/url_that_delays_loading")
try:
    myDynamicElement = driver.find_element_by_id("myDynamicElement")
except NoSuchElementException:
    print("Element not found")

4. Wait for the elements to become interactive

from  import WebDriverWait
from  import expected_conditions as EC
from  import By
 
element = WebDriverWait(driver, 10).until(
    EC.element_to_be_clickable((, 'myElement'))
)

5. Avoid elements being blocked by other elements

element = driver.find_element_by_id("myElement")
driver.execute_script("arguments[0]. = 9999;", element)

6. Use JavaScript for interactive hardcore

element = driver.find_element_by_id("myElement")
driver.execute_script("arguments[0].click();", element)

7. Use JavaScript or jQuery to change the visibility of elements

element = driver.find_element_by_id("myElement")
driver.execute_script("arguments[0]. = 'block';", element)

8. Scroll to element

element = driver.find_element_by_id("myElement")
driver.execute_script("arguments[0].scrollIntoView();", element)

9. Simulate complex user interactions

from  import ActionChains
 
element = driver.find_element_by_id("myElement")
actions = ActionChains(driver)
actions.move_to_element(element).perform()

10. Ultimate Invincible Violence Method: Fixing bug iterations multiple times

Summarize

The above is personal experience. I hope you can give you a reference and I hope you can support me more.