I'm trying to write a script to test an option of a website, this option enables users to edit their own message and so it's represented by a pencil icon which has the xpath:


The problem is that icon appears only if users hover their own message with their mouse. So for Selenium it's not a visible element and I have an Exception.

I have another exception now, and I think it's linked to the hov.perform()

This is the message:

Traceback (most recent call last):
File "private_discussion_script.py", line 50, in test_script_shift
hov = ActionChains(driver).move_to_element(element).perform()
File "C:\PYTHON27\lib\site-packages\selenium-3.0.0b3-py2.7.egg\selenium\webdriver\common\action_chains.py", line 74, in perform
File "C:\PYTHON27\lib\site-packages\selenium-3.0.0b3-py2.7.egg\selenium\webdriver\common\action_chains.py", line 225, in <lambda>
Command.MOVE_TO, {'element': to_element.id}))
File "C:\PYTHON27\lib\site-packages\selenium-3.0.0b3-py2.7.egg\selenium\webdriver\remote\webdriver.py", line 236, in execute
File "C:\PYTHON27\lib\site-packages\selenium-3.0.0b3-py2.7.egg\selenium\webdriver\remote\errorhandler.py", line 192, in check_response
raise exception_class(message, screen, stacktrace)
WebDriverException: Message: POST /session/80574c31-b05c-4bb7-8cb2-053ebe4eeae5/moveto did not match a known command`

1 Answer 1


You need to perform a mouseover action onto this element to make it visible first.

from selenium.webdriver.common.action_chains import ActionChains

def hover(self):
    browser = webdriver_connection.connection
    element = browser.find_element_by_xpath(your xpath)
    hov = ActionChains(browser).move_to_element(element)
  • When I perform element = driver.find_element_by_xpath("//*[@id='content']/div[2]/div/div[2]/div/div[2]/div[1]/div/div[26]/div[3]/div[1]/span[1]/button[1]")
    – LeBrequin
    Oct 15, 2016 at 5:51
  • Sorry, when I perform this line, I have the NoSuchElement exception.
    – LeBrequin
    Oct 15, 2016 at 5:52
  • can you please post the HTML here?
    – Yu Zhang
    Oct 15, 2016 at 6:07
  • You're getting a no such element exception because probably the hoverover takes a little bit of time to load once you have reached that element. Once you go at this element, use some waiting to wait for 5-10 seconds Oct 15, 2016 at 9:12
  • This is the HTML of this icon:
    – LeBrequin
    Oct 15, 2016 at 10:00

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