How do I use Selenium's wait?


I’m having trouble on figuring out how to use Selenium’s wait function. What I’m trying to do is check to see if a element is present and if it is then it’ll print a statement. Here is my code:

from selenium import webdriver
from import WebDriverWait
from import expected_conditions as EC
from selenium.common.exceptions import TimeoutException

browser = webdriver.Firefox()
delay = 3 # seconds
    WebDriverWait(browser, delay).until(EC.presence_of_element_located(browser.find_element_by_xpath('//*[@id="hplogo"]')))
    print ("Page is ready!")
except TimeoutException:
    print ("Loading took too much time!")

The current code gives me the following errors:

Traceback (most recent call last):
  File "/Users/John/Documents/", line 10, in <module>
    WebDriverWait(browser, delay).until(EC.presence_of_element_located(browser.find_element_by_xpath('//*[@id="hplogo"]')))
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/selenium/webdriver/support/", line 71, in until
    value = method(self._driver)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/selenium/webdriver/support/", line 59, in __call__
    return _find_element(driver, self.locator)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/selenium/webdriver/support/", line 274, in _find_element
    return driver.find_element(*by)
TypeError: find_element() argument after * must be a sequence, not WebElement
Asked By: John Pham



Expected condition expects a tuple to be passed in where the first item is the locator’s type (By constant) and the second is the locator’s value:

from import By
from import WebDriverWait
from import expected_conditions as EC    

wait = WebDriverWait(browser, 10)
wait.until(EC.presence_of_element_located((By.XPATH, '//*[@id="hplogo"]')))

Note that in your case By.ID would be simpler:

wait.until(EC.presence_of_element_located((By.ID, 'hplogo')))
Answered By: alecxe

you need to import the By module

from import By
Answered By: Justin Miller

if you are using chrome, then it works with

from import expected_conditions

The other imports are okay, does not need change regarding the browser.

Answered By: Lorela Dumbravă
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