I'm trying to play QWOP using Selenium on Chrome but I keep getting the following error:
selenium.common.exceptions.NoSuchElementException:
Message: no such element: Unable to locate element
{"method":"id","selector":"window1"
(Session info: chrome=63.0.3239.108
(Driver info: chromedriver=2.34.522913
(36222509aa6e819815938cbf2709b4849735537c), platform=Linux 4.10.0-42-generic x86_64)
while using the following code:
from selenium import webdriver
from selenium.webdriver.common.action_chains import ActionChains
import time
browser = webdriver.Chrome()
browser.set_window_size(640, 480)
browser.get('http://www.foddy.net/Athletics.html?webgl=true')
browser.implicitly_wait(10)
canvas = browser.find_element_by_id("window1")
canvas.click()
while (True):
action = ActionChains(browser)
action.move_to_element(canvas).perform()
canvas.click()
canvas.send_keys("q")
The same code works perfectly on Firefox, but because I want to use chrome's capability to run an webgl game in headless mode I can't really switch to Firefox.
Any workarounds to get this working?
selenium.common.exceptions.NoSuchElementException popularly known as NoSuchElementException
is defined as :
exception selenium.common.exceptions.NoSuchElementException(msg=None, screen=None, stacktrace=None)
NoSuchElementException
is basically thrown in 2 cases as follows :
When using :
webdriver.find_element_by_*("expression")
//example : my_element = driver.find_element_by_xpath("xpath_expression")
When using :
element.find_element_by_*("expression")
//example : my_element = element.find_element_by_*("expression")
As per the API Docs just like any other selenium.common.exceptions
, NoSuchElementException
should contain the following parameters :
msg, screen, stacktrace
raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element: {"method":"xpath","selector":".//*[@id='create-portal-popup']/div[4]/div[1]/button[3]"}
(Session info: chrome=61.0.3163.100)
(Driver info: chromedriver=2.32.498550 (9dec58e66c31bcc53a9ce3c7226f0c1c5810906a),platform=Windows NT 10.0.10240 x86_64)
The reason for NoSuchElementException can be either of the following :
<iframe>
tag.The solution to address NoSuchElementException can be either of the following :
Adopt a Locator Strategy which uniquely identifies the desired WebElement. You can take help of the Developer Tools (Ctrl+Shift+I or F12) and use Element Inspector.
Here you will find a detailed discussion on how to inspect element in selenium3.6 as firebug is not an option any more for FF 56?
Use execute_script()
method to scroll the element in to view as follows :
elem = driver.find_element_by_xpath("element_xpath")
driver.execute_script("arguments[0].scrollIntoView();", elem)
Here you will find a detailed discussion on Scrolling to top of the page in Python using Selenium
Incase element is having the attribute style="display: none;", remove the attribute through executeScript()
method as follows :
elem = driver.find_element_by_xpath("element_xpath")
driver.execute_script("arguments[0].removeAttribute('style')", elem)
elem.send_keys("text_to_send")
To check if the element is within an <iframe>
traverse up the HTML to locate the respective <iframe>
tag and switchTo()
the desired iframe through either of the following methods :
driver.switch_to.frame("iframe_name")
driver.switch_to.frame("iframe_id")
driver.switch_to.frame(1) // 1 represents frame index
Here you can find a detailed discussion on How can I select a html element no matter what frame it is in in selenium?.
If the element is not present/visible in the HTML DOM immediately, induce WebDriverWait with expected_conditions set to proper method as follows :
To wait for presence_of_element_located :
element = WebDriverWait(driver, 20).until(expected_conditions.presence_of_element_located((By.XPATH, "element_xpath']")))
To wait for visibility_of_element_located :
element = WebDriverWait(driver, 20).until(expected_conditions.visibility_of_element_located((By.CSS_SELECTOR, "element_css")
To wait for element_to_be_clickable :
element = WebDriverWait(driver, 20).until(expected_conditions.element_to_be_clickable((By.LINK_TEXT, "element_link_text")))
You are seeing NoSuchElementException
because the id locator doesn't identifies the canvas uniquely. To identify the canvas and click()
on it you have to wait for the canvas to be clickable
and to achieve that you can use the following code block :
WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.XPATH, "//canvas[@id='window1']"))).click()
You can find Selenium's java client based relevant discussion in: