Selenium 的 WebDriver.execute_script() 返回“无”

Question

我的程序无法使用 Selenium 从网页获取现有类。我的 WebDriver.execute_script 函数似乎不起作用。

import urllib
from selenium import webdriver

#Path to the chromedriver is definitely working fine.
path_to_chromedriver = 'C:\Users\Ben\Desktop\Coding\FreeFoodFinder\chromedriver.exe'
browser = webdriver.Chrome(executable_path = path_to_chromedriver)
url = 'http://www.maidservicetexas.com/'
browser.implicitly_wait(30)
browser.get(url)
content = browser.execute_script("document.getElementsByClassName('content')");
#Just printing the first character of the returned content's toString for now. Don't want the whole thing yet.
#Only ever prints 'N', the first letter of 'None'...so obviously it isn't finding the jsgenerated content even after waiting.
print content

我的程序返回“无”，这告诉我 javascript 函数没有返回值/正在执行。Chrome 的网络开发工具告诉我“内容”当然是一个有效的类名。该网页甚至不是动态生成的（我的最终目标是抓取动态内容，这就是为什么我让我的 WebDriver 在运行脚本之前等待 30 秒。）

Answer 1

返回值：

content = browser.execute_script("return document.getElementsByClassName('content');");