“站点 url"中发生错误:未捕获的类型错误:无法使用 Selenium 和 Python 读取未定义的属性“getColomnSet"

2022-01-16 00:00:00 python selenium selenium-webdriver webdriver javascript

我正在尝试使用 Selenium for Python 和 Chrome 网络驱动程序来自动下载文件.

I am trying to use Selenium for Python eith the Chrome webdriver to automate the download of a file.

我的程序完美运行到最后一步(点击下载"按钮)，此时会触发一个带有文本的对话框:

My program works perfectly up to the last step (clicking on the 'download' button) at which point a dialog box is triggered with the text:

‘站点 url’出现错误:未捕获的 TypeError:无法读取 undefined41 的属性‘getColomnSet’"

这个错误是什么意思，最可能的原因是什么?

What does this error mean and what are the most probable causes?

作为参考，这里是我程序的最后几个命令:

For reference, here are the last few commands of my program:

try:
    elem = wait.until(EC.presence_of_element_located((By.ID,'element_1_id')))
finally:
    elem1 = driver.find_element_by_id('element_1_id')
    elem2 = driver.find_element_by_id('element_2_id')
    action = ActionChains(driver).move_to_element(elem1).move_to_element(elem2)
    action.perform()
    elem2.click()

推荐答案

这个错误信息...

An error has occured in 'site url': Uncaught TypeError: Cannot read property 'getColomnSet' of undefined

...暗示您的程序在尝试下载所需文件时无法读取属性getColomnSet.

...implies that your program was unable to read the property getColomnSet while trying to download the desired file.

可能，主要问题是在客户端呈现 js" rel="nofollow noreferrer">HTML DOM 完全.

Possibly, the main problem is the js involved to download the document is invoked before the client renders the HTML DOM completely.

相关的HTML、更多的之前的代码行和错误堆栈跟踪会让我们对怎么了.

The relevant HTML, a bit more of your previous lines of code and the error stack trace would have given us some more idea about what's going wrong.

  • 您可以诱导一些措施等到完成 DOM 树在讨论之后呈现:
    • 检查页面是否已在 Selenium 中完全加载的通用函数
    • 在您的代码试验中，我没有看到您与元素 (By.ID,'element_1_id') 交互，因此您可能可以删除 presence_of_element_located() 的步骤 对于元素 (By.ID,'element_1_id').
    • 如果您仍然需要 presence_of_element_located((By.ID,'element_1_id')) 捕获异常并启动所需步骤.
    • 当您在 elem1 和 elem2 上调用 move_to_element() 并继续调用 perform() 时，您需要用 WebDriverWait.webdriver.support.expected_conditions" rel="nofollow noreferrer">expected_conditions 作为 element_to_be_clickable(locator)
    • In your code trials I don't see you interacting with the element (By.ID,'element_1_id') so possibly you can remove the step of presence_of_element_located() for the element (By.ID,'element_1_id').
    • If you still require presence_of_element_located((By.ID,'element_1_id')) catch the exception and initiate required steps.
    • As you invoke move_to_element() over elem1 and elem2 and moving ahead invoke perform() you need to induce WebDriverWait with expected_conditions as element_to_be_clickable(locator)
    • 无法使用画布读取 null 的属性getContext"
    • 未捕获的类型错误:无法读取未定义的属性getContext"
    • 未捕获的错误 remote.js

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