如何获得Python导航到链接并从此子链接打印多个数据点？

Question

我正在查看的是父URL。

https://en.wikipedia.org/wiki/List_of_current_members_of_the_United_States_Senate

从那里，我想让Python单击几个链接，所有链接都是（'td'）[3] .a ['href']。父 URL 中的前三个是： 'Richard Shelby', 'Doug Jones', and 'Lisa Murkowski'。所有子链接都有与此匹配的文本： 'Assumed office'。我想抓住所有这些日期'Assumed office'。因此，因为'Richard Shelby'它将是：

Assumed office

January 3, 1987

Assumed office

April 10, 2018

我怎样才能做到这一点？

对于导航到几个不同的链接，我认为它将看起来像这样...

from urllib.parse import urljoin

senator_link = "https://en.wikipedia.org/wiki/List_of_current_members_of_the_United_States_Senate"

senator_link = row.find_all('td')[3].a['href']

senator_link = urljoin(link, senator_link)

response = session.get(senator_link)

with requests.Session() as session:

    html = session.get(link).text

    soup = BeautifulSoup(response.content, "lxml")

    res = soup.findAll("span", {"class": "nowrap"})

    for r in res:

        print("Assumed Office: " + r.find("span", {'class': 'nowrap'}).text)

我得到的那段代码是这样的：

AttributeError: 'NoneType' object has no attribute 'text'