如何使用Selenium python检索youtube评论？

Question

这是我写的代码

for ele in driver.find_elements_by_css_selector("h3.yt-lockup-title"):

    anchor = ele.find_element_by_tag_name('a')
    links.append("%s" % anchor.get_attribute('href'))

print "Links:\n", "\n".join(links), "\n"

for link in links:
    driver.get(link)
    for element in driver.find_elements_by_css_selector("div.Ct"):
        print element.text

问题是此代码返回空字符串。