无法提取＆＃39; pre＆＃39;来自网页的标签

Question

我尝试提取“＆＃39; pre＆＃39;中包含的所有范围信息。标签（例如＆＃34; span class =＆＃34; n＆＃34;＆gt;数据＆＃34;）在＆＃39; https://www.kaggle.com/arthurtok/interactive-intro-to-dimensionality-reduction/notebook＆＃39;使用BeautifulSoup，但我无法获得显示的信息。我一直得到＆＃34;属性错误：＆＃39; NoneType＆＃39;对象没有属性＆＃39;内容＆＃39;＆＃34;

以下是我目前使用的代码：

url = 'https://www.kaggle.com/arthurtok/interactive-intro-to-dimensionality-reduction/notebook'
urlRead = urllib.request.urlopen(url).read()
soup = BeautifulSoup(urlRead, 'lxml')
prePrint = soup.find("pre").contents[0]
print(prePrint)

我是否在urlRead中错误地阅读了网页，或者我无法使用BeautifulSoup提取信息？