Python Selenium selenium.common.exceptions.StaleElementReferenceException

Question

我最近开始学习自动化。我正在尝试自动化Finnair.com网站。 但在我的代码中出现了以下问题。在点击 "Helsinki "项目之前，它都能正常工作。

错误。

check_response
raise exception_class(message, screen, stacktrace) selenium.common.exceptions.StaleElementReferenceException: Message: stale element reference: element is not attached to the page document Traceback (most recent call last): line 35, in <module>
if city.text == "Helsinki (HEL)": line 76, in text
return self._execute(Command.GET_ELEMENT_TEXT)['value'] Python37\lib\site-packages\selenium\webdriver\remote\webelement.py", line 633, in _execute
return self._parent.execute(command, params)   line 321, in execute
self.error_handler.check_response(response) line 242, in check_response
raise exception_class(message, screen, stacktrace) selenium.common.exceptions.StaleElementReferenceException: Message: stale element reference: element is not attached to the page document  (Session info: chrome=81.0.4044.138)--- Error

我的代码

driver.get("https://www.finnair.com/us-en")
time.sleep(5)
driver.find_element_by_xpath("//button[contains(@class,'btn rounded pr-large-x tr-small')]").click()
time.sleep(5)
wait = WebDriverWait(driver,10)
traveltype = driver.find_elements_by_css_selector("span.mr-xxsmall-l")
traveltype[1].click()  #Oneway according to the index  to change i can say 0
print(len(traveltype))
#Selecting Orgin and Destination Locations
driver.find_element_by_class_name("bw-origin").click()
time.sleep(5)
driver.find_element_by_css_selector("#origin-input").send_keys("HEL")
time.sleep(5)
#driver.find_element_by_xpath("//div[text()='Helsinki (HEL)']").click()
orgin = driver.find_elements_by_css_selector("div.ts-xsmall")
time.sleep(5)
for city in orgin:
    if city.text == "Helsinki (HEL)":
        city.click()
time.sleep(5)
driver.find_element_by_xpath("//div[contains(@class,'bw-destination')]").click()
driver.find_element_by_xpath("//input[contains(@placeholder,'Type and select destination')]").send_keys("TLL")
driver.find_element_by_xpath("//div[text()='Tallinn (TLL)']").click()

Answer 1

只要添加一个 break 在你点击该元素后，就会出现 "bw-origin"。一旦你找到并点击了匹配，原点列表（"bw-origin"）就不存在了。这就是导致 StaleElementReferenceException. 同时也不需要在找到匹配项后循环浏览整个列表。

for city in orgin:
    if city.text == "Helsinki (HEL)":
        city.click()
        break

附注 - 考虑使用更多的 WebDriverWaits和少 time.sleep.