How to solve selenium.common.exceptions.NoSuchElementException: Message: Unable to locate element:-CodePudding

I'm trying to code a bot that will automate a login on a certain page using selenium. I keep getting the same error, and I don't know how to fix it. Please help :=)

Here's the code:

# Importing everything #
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.common.keys import Keys
import time

# PATH   Driver Setup #
PATH = "C:\Program Files (x86)\chromedriver.exe"
driver = webdriver.Chrome(PATH)

# Getting All Requirements #
driver.get("https://ytmonster.net/login")
time.sleep(5)
imputUsername = driver.find_element(By.ID, "inputUsername")
imputPassword = driver.find_element(By.ID, "inputPassword")
linkClick = driver.find_element(By.CLASS_NAME, "btn btn-success")

# Executing script #
imputUsername.send_keys("[email protected]")
imputPassword.send_keys("mypassword")
linkClick.click

And here is the error that I get:

C:\Users\Xera\Desktop\YtMonster Bot.py:9: DeprecationWarning: executable_path has been deprecated, please pass in a Service object
  driver = webdriver.Chrome(PATH)

DevTools listening on ws://127.0.0.1:51847/devtools/browser/a848e7ed-d31d-4415-96c5-1a28a4729a17
[8664:1220:0815/155348.366:ERROR:device_event_log_impl.cc(214)] [15:53:48.364] Bluetooth: bluetooth_adapter_winrt.cc:1074 Getting Default Adapter failed.
Traceback (most recent call last):
  File "C:\Users\Xera\Desktop\YtMonster Bot.py", line 16, in <module>
    linkClick = driver.find_element(By.CLASS_NAME, "btn btn-success")
  File "C:\Users\Xera\AppData\Local\Programs\Python\Python310\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 856, in find_element
    return self.execute(Command.FIND_ELEMENT, {
  File "C:\Users\Xera\AppData\Local\Programs\Python\Python310\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 434, in execute
    self.error_handler.check_response(response)
  File "C:\Users\Xera\AppData\Local\Programs\Python\Python310\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 243, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element: {"method":"css selector","selector":".btn btn-success"}
  (Session info: chrome=104.0.5112.81)
Stacktrace:
Backtrace:
        Ordinal0 [0x00CA78B3 2193587]
        Ordinal0 [0x00C40681 1771137]
        Ordinal0 [0x00B541A8 803240]
        Ordinal0 [0x00B824A0 992416]
        Ordinal0 [0x00B8273B 993083]
        Ordinal0 [0x00BAF7C2 1177538]
        Ordinal0 [0x00B9D7F4 1103860]
        Ordinal0 [0x00BADAE2 1170146]
        Ordinal0 [0x00B9D5C6 1103302]
        Ordinal0 [0x00B777E0 948192]
        Ordinal0 [0x00B786E6 952038]
        GetHandleVerifier [0x00F50CB2 2738370]
        GetHandleVerifier [0x00F421B8 2678216]
        GetHandleVerifier [0x00D317AA 512954]
        GetHandleVerifier [0x00D30856 509030]
        Ordinal0 [0x00C4743B 1799227]
        Ordinal0 [0x00C4BB68 1817448]
        Ordinal0 [0x00C4BC55 1817685]
        Ordinal0 [0x00C55230 1856048]
        BaseThreadInitThunk [0x766A6739 25]
        RtlGetFullPathName_UEx [0x779F90AF 1215]
        RtlGetFullPathName_UEx [0x779F907D 1165]

How can I fix this? I tried everything but didn't find any answers... Thanks again for the help! :)

CodePudding user response：

This is because your page elements get changed after you manipulate it using Selenium. Try other ways to access the desired element such as xpath. Selecting by class often causes this exception as the class of your html elements can change. For example, once a tab is clicked, the class can change to something like: tab-button active, while prior to the clicking, it was something like: tab-button. I recommend using xpath. It is very powerful as it enhances your ability to access items in a relative way from each other. You can for example say I want the i-th children of my first row inside a table inside body inside html tag.

CodePudding user response：

This is one way of accomplishing your task:

from selenium import webdriver
from selenium.webdriver.firefox.service import Service
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.firefox.options import Options as Firefox_Options
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support.ui import Select
from selenium.webdriver.support import expected_conditions as EC
import time as t

firefox_options = Firefox_Options()

# firefox_options.add_argument("--width=1500")
# firefox_options.add_argument("--height=500")
# firefox_options.headless = True

driverService = Service('chromedriver/geckodriver')

browser = webdriver.Firefox(service=driverService, options=firefox_options)

url = 'https://ytmonster.net/login'

browser.get(url)

WebDriverWait(browser, 20).until(EC.element_to_be_clickable((By.XPATH, "//input[@id='inputUsername']"))).send_keys('my_great_username')
WebDriverWait(browser, 20).until(EC.element_to_be_clickable((By.XPATH, "//input[@id='inputPassword']"))).send_keys('my really bad password')
print('wrote in my user and pass')
WebDriverWait(browser, 20).until(EC.element_to_be_clickable((By.XPATH, "//button[text()='Login']"))).click()
print('clicked the login button!')

The setup is Firefox /geckodriver on Linux, however you can adapt it to your own system, just observe the imports, and the part after defining the browser/driver. Selenium docs: https://www.selenium.dev/documentation/