Question

我一直在尝试收集Youtube Gaming上的直播频道/观众列表。我正在使用selenium和Python强制网站向下滚动页面，以便加载更多的11个频道。作为参考，this是我正在处理的网页。

我找到了我想要的数据的位置，但我正在努力让硒去那里。我遇到麻烦的部分看起来像这样：

<div class="style-scope ytg-gaming-video-renderer" id="video-metadata"><span class="title ellipsis-2 style-scope ytg-gaming-video-renderer"><ytg-nav-endpoint class="style-scope ytg-gaming-video-renderer x-scope ytg-nav-endpoint-2"><a href="/watch?v=FFKSD1HHrdA" tabindex="0" class="style-scope ytg-nav-endpoint" target="_blank">
              Live met Bo3
            </a></ytg-nav-endpoint></span>
    <div class="channel-info small layout horizontal center style-scope ytg-gaming-video-renderer">
        <ytg-owner-badges class="style-scope ytg-gaming-video-renderer x-scope ytg-owner-badges-0">
            <template class="style-scope ytg-owner-badges" is="dom-repeat"></template>
        </ytg-owner-badges>
        <ytg-formatted-string class="style-scope ytg-gaming-video-renderer">
            <ytg-nav-endpoint class="style-scope ytg-formatted-string x-scope ytg-nav-endpoint-2"><a href="/channel/UCD8Q9V5wgo8o0XGfUqsRrDQ" tabindex="0" class="style-scope ytg-nav-endpoint" target="_blank">Rico Eeman</a>
            </ytg-nav-endpoint>
        </ytg-formatted-string>
    </div><span class="ellipsis-1 small style-scope ytg-gaming-video-renderer" id="video-viewership-info" hidden=""></span>
    <div id="metadata-badges" class="small style-scope ytg-gaming-video-renderer">
        <ytg-live-badge-renderer class="style-scope ytg-gaming-video-renderer x-scope ytg-live-badge-renderer-1">
            <template class="style-scope ytg-live-badge-renderer" is="dom-if"></template>

            <span aria-label="" class="text layout horizontal center style-scope ytg-live-badge-renderer">4 watching</span>
            <template class="style-scope ytg-live-badge-renderer" is="dom-if"></template>
        </ytg-live-badge-renderer>
    </div>
</div>

目前，我正在尝试：

#This part works fine. I can use the unique ID
meta_data = driver.find_element_by_id('video-metadata')

#This part is also fine. Once again, it has an ID.
viewers = meta_data.find_element_by_id('metadata-badges')
print(viewers.text)

但是，我一直无法访问频道名称（在此示例中为'Rico Eeman'，并且它位于第一个嵌套的div标签下）。因为它是一个复合类名，我无法按类名找到该元素，并且尝试以下xpath不起作用：

name = meta_data.find_element_by_xpath('/div[@class="channel-info small layout horizontal center style-scope ytg-gaming-video-renderer"]/ytg-formatted-string'

name = meta_data.find_element_by_xpath('/div[1])

它们都会引发元素未找到错误。我不知道该怎么做。有没有人有工作解决方案？

Answer 1

名称ID不在<ytg-formatted-string>标记中，而是在其中一个后代中。尝试

meta_data.find_element_by_css_selector('.style-scope.ytg-formatted-string.x-scope.ytg-nav-endpoint-2 > a')

或xpath

meta_data.find_element_by_xpath('//ytg-nav-endpoint[@class="style-scope ytg-formatted-string x-scope ytg-nav-endpoint-2"]/a')

Answer 2

这将获得所有名称，即使您使用video-metadata工作的xpath无法获取所有名称，每个用户的每个div重复ID，因此您需要 find_elements 和迭代返回的元素：

names = dr.find_elements_by_css_selector("a.style-scope.ytg-nav-endpoint[href^='/channel/']")
print([name.get_attribute("text") for name in names])

这给了你：

['NinjaNation Gaming', 'DURX DANIEL', 'DEMON', 'Perfection', 'The one and only jd', 'Violator Games', 'KingLuii718', 'NinjaNation Gaming', 'DURX DANIEL', 'DEMON', 'Perfection']

使用Python在Selenium中查找元素时遇到麻烦

2 个答案: