选择器无效:使用Selenium时，不允许使用复合类名称错误 [英] Invalid selector: Compound class names not permitted error using Selenium

问题描述

我正在尝试通过webWhatsapp从聊天中打印我的一条消息.

I am trying to print one of my messages from a chat via webWhatsapp.

我能够通过控制台"选项卡中的Javascript完成此操作

I was able to do it via Javascript from the Console tab i did it this way

recived_msg = document.getElementsByClassName('XELVh selectable-text invisible-space copyable-text') // returns an array of the chat
recived_msg[5].innerText // shows me the 4th message content

问题是我试图在python上做同样的事情，但对我不起作用.

The problem is that i tried to do same thing on python but it doesnt work for me..

这里是我尝试过的:

from selenium import webdriver
recived_msg = driver.find_element_by_class_name('XELVh selectable-text invisible-space copyable-text')
final = recived_msg[5].innerText #doesnt work for some reason

我遇到的错误是:消息:无效的选择器:不允许使用复合类名称

my Error that i'm getting is: Message: invalid selector: Compound class names not permitted

我对javascript还是很陌生，因此对您的误会表示歉意，并感谢您的帮助！ :)

I'm kinda new to javascript so sorry for missunderstanding and thank you for your help! :)

推荐答案

根据所以

• 使用find_element_by_class_name()，您将无法传递多个类名. 传递多个类，您将面临以下错误:

• Using find_element_by_class_name() you won't be able to pass multiple class names. Passing multiple classes you will face the error as:

Message: invalid selector: Compound class names not permitted

此外，由于您希望返回聊天数组，因此需要使用 find_elements*

Additionally, as you want to return an array of the chats, so instead of find_element* you need to use find_elements*

您也可以使用以下任一方法:定位器策略:

As an alternative you can use either of :the following Locator Strategies:

• CSS_SELECTOR:

recived_msg = driver.find_elements_by_css_selector(".XELVh.selectable-text.invisible-space.copyable-text")

XPATH:

recived_msg = driver.find_elements_by_xpath("//*[@class='XELVh selectable-text invisible-space copyable-text']")

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