Python WebdriverWait 显示 TimeoutException，如果我使用 sleep.time 它工作正常
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WebdriverWait is showing TimeoutException, if i use sleep.time it works ok
提问by Riaz Ladhani
I want to use WebdriverWait for when clicking elements in Python Webdriver. I get the following TimeoutException error when using WebdriverWait:
单击 Python Webdriver 中的元素时，我想使用 WebdriverWait。使用 WebdriverWait 时出现以下 TimeoutException 错误：
Traceback (most recent call last):
File "C:\Users\riaz.ladhani\PycharmProjects\Selenium Webdriver\ClearCore\TestCases\AdministrationPage_TestCase.py", line 30, in test_add_Project
administration_page = login_page.clickAdministration()
File "C:\Users\riaz.ladhani\PycharmProjects\Selenium Webdriver\ClearCore\Pages\login.py", line 46, in clickAdministration
WebDriverWait (self.driver, 10).until(lambda d: self.driver.find_element(*MainPageLocators.AdministrationButton_xpath).click())
File "C:\Python27\lib\site-packages\selenium\webdriver\support\wait.py", line 75, in until
raise TimeoutException(message, screen, stacktrace)
TimeoutException: Message:
If I use time.sleep(10)it works ok and clicks the elements. I have reverted all my links to time.sleep for now until I can get WebdriverWaitto work properly.
如果我使用time.sleep(10)它可以正常工作并单击元素。我已经将所有链接恢复到 time.sleep，直到我可以WebdriverWait正常工作为止。
My code snippet for WebdriverWait is:
我的 WebdriverWait 代码片段是：
class LoginPage(BasePage):
#Click Administration from top menu
def clickAdministration(self):
WebDriverWait (self.driver, 10).until(lambda d: self.driver.find_element(*MainPageLocators.AdministrationButton_xpath).click())
#time.sleep(10)
return AdministrationPage(self.driver)
The imports are:
进口是：
from selenium.webdriver.support.ui import WebDriverWait
from selenium.common.exceptions import TimeoutException
class LoginPage_TestCase(unittest.TestCase):
def test_add_Project(self):
login_page = login.LoginPage(self.driver)
login_page.userLogin_valid()
administration_page = login_page.clickAdministration()
Is my WebdriverWaitsyntax correct? Why the TimeoutException?
我的WebdriverWait语法正确吗？为什么会出现超时异常？
If I use time.sleep(secs), it works fine but not the best efficient way to do it.
如果我使用time.sleep(secs)，它工作正常，但不是最有效的方法。
采纳答案by alecxe
You are not using the Explicit Wait correctly - you need to make use of Expected Conditions - callables that would be called repeatedly until return True. You are returning the result of click()method which returns Nonewhich is falsy - the expected condition never returns Trueand, hence, you are getting TimeoutException.
您没有正确使用显式等待 - 您需要使用预期条件 - 可重复调用直到返回的可调用对象True。您正在返回返回错误的click()方法的结果None- 预期条件永远不会返回True，因此，您将获得TimeoutException.
In this case, built-in element_to_be_clickablefits nicely, example:
在这种情况下，内置非常element_to_be_clickable适合，例如：
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By
wait = WebDriverWait(self.driver, 10)
element = wait.until(EC.element_to_be_clickable((By.XPATH, '//div[@class="test"]')))
element.click()
回答by gourav
wait = WebDriverWait(driver, 10)
paragraph = wait.until(EC.element_to_be_located((By.CSS_SELECTOR,"body > p:nth-child(3)")))
paragraph.getText()
