python 硒 selenium.common.exceptions.StaleElementReferenceException 错误

Question

我有以下代码

from selenium import webdriver
from selenium.webdriver.support.ui import WebDriverWait

driver = webdriver.Firefox()

driver.get("https://itunesconnect.apple.com/WebObjects/iTunesConnect.woa")
username = WebDriverWait(driver, 20).until(lambda driver : driver.find_element_by_id('appleId'))
password = WebDriverWait(driver, 20).until(lambda driver : driver.find_element_by_id('pwd'))

username.send_keys("xxxxxxxxxx.com")
password.send_keys("xxxxxxxx")

password.submit()

但是我得到以下错误

password.submit()
File "/Users/.virtualenvs/itunes/lib/python2.7/site-packages/selenium/webdriver/remote/webelement.py", line 84, in submit
    self._execute(Command.SUBMIT_ELEMENT)
  File "/Users/.virtualenvs/itunes/lib/python2.7/site-packages/selenium/webdriver/remote/webelement.py", line 457, in _execute
    return self._parent.execute(command, params)
  File "/Users/.virtualenvs/itunes/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 233, in execute
    self.error_handler.check_response(response)
  File "/Users/.virtualenvs/itunes/lib/python2.7/site-packages/selenium/webdriver/remote/errorhandler.py", line 194, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.StaleElementReferenceException: Message: Element not found in the cache - perhaps the page has changed since it was looked up
Stacktrace:
    at fxdriver.cache.getElementAt (resource://fxdriver/modules/web-element-cache.js:9454)
    at Utils.getElementAt (file:///var/folders/x1/1bwt313j0qvgdh5pfzpbpvcw0000gn/T/tmpR5A61x/extensions/fxdriver@googlecode.com/components/command-processor.js:9039)
    at WebElement.submitElement (file:///var/folders/x1/1bwt313j0qvgdh5pfzpbpvcw0000gn/T/tmpR5A61x/extensions/fxdriver@googlecode.com/components/command-processor.js:12156)
    at DelayedCommand.prototype.executeInternal_/h (file:///var/folders/x1/1bwt313j0qvgdh5pfzpbpvcw0000gn/T/tmpR5A61x/extensions/fxdriver@googlecode.com/components/command-processor.js:12661)
    at fxdriver.Timer.prototype.setTimeout/<.notify (file:///var/folders/x1/1bwt313j0qvgdh5pfzpbpvcw0000gn/T/tmpR5A61x/extensions/fxdriver@googlecode.com/components/command-processor.js:625)

有什么问题吗？

Answer 1

有时，当您对某个元素执行任何操作时，它的某些属性（例如 class、值等）会发生变化，您无法进一步访问它。

解决此问题的最简单方法是再次识别此元素并使用它，例如：

pass = WebDriverWait(driver, 20).until(lambda driver : driver.find_element_by_id('pwd'))
pass.submit();

示例：当您检查密码字段时，转到 apple.com 登录页面。您会发现，当您单击该字段时，它的 class 从 password 变为 password focused，当您在其上键入时，它变为 password focused edited。

Answer 2

当您在密码字段中输入时，会呈现 DOM。你需要重新安置它

password = WebDriverWait(driver, 20).until(lambda driver : driver.find_element_by_class_name('dots')) # class dots is added in the rendering
password.submit()

python 硒 selenium.common.exceptions.StaleElementReferenceException 错误

python selenium selenium.common.exceptions.StaleElementReferenceException error

python

selenium

selenium-firefoxdriver