使用BeautifulSoup提取<td>文本报错，如何获取目标数字或最大值？

原代码：

url = "C:\\local.html"
page = open(url)
soup = BeautifulSoup(page.read(), "html.parser")
NoFall = soup.find_all("div", {"id":"Kendo_Table1535711951642"})
for AuxCopy in NoFall:
    product = AuxCopy.find('table').find_all('tr')
    for tr in product:
        td = tr.find_all('td', {"data-label":"Fallen Behind Days"})
        print(td)

代码输出：

[]
[]
[<td class="ng-binding ng-scope nowrap" data-colid="FallenBehindDays" data-label="Fallen Behind Days" title="1">1</td>]
[<td class="ng-binding ng-scope nowrap" data-colid="FallenBehindDays" data-label="Fallen Behind Days" title="0">0</td>]
[<td class="ng-binding ng-scope nowrap" data-colid="FallenBehindDays" data-label="Fallen Behind Days" title="6">6</td>]
[<td class="ng-binding ng-scope nowrap" data-colid="FallenBehindDays" data-label="Fallen Behind Days" title="1">1</td>]

尝试用td.text提取数字时，出现错误：

AttributeError: ResultSet object has no attribute 'text'. You're probably treating a list of elements like a single element. Did you call find_all() when you meant to call find()?

需求：提取出td内的数字（1、0、6、1），或找出其中的最大值。

错误原因 #

find_all()返回的是元素列表（ResultSet），列表本身没有.text属性，必须针对列表内的单个元素调用该属性。而每个<tr>里仅存在一个符合data-label="Fallen Behind Days"的<td>，因此更适合用find()直接获取单个元素。

1. 提取所有数字 #

修改代码，用find()替代find_all()，并跳过无匹配的行：

url = "C:\\local.html"
page = open(url)
soup = BeautifulSoup(page.read(), "html.parser")
NoFall = soup.find_all("div", {"id":"Kendo_Table1535711951642"})
for AuxCopy in NoFall:
    product = AuxCopy.find('table').find_all('tr')
    for tr in product:
        td = tr.find('td', {"data-label":"Fallen Behind Days"})
        if td:
            print(td.text.strip())

输出结果：

1
0
6
1

2. 找出最大值 #

提取数字并转为整数，存入列表后取最大值：

url = "C:\\local.html"
page = open(url)
soup = BeautifulSoup(page.read(), "html.parser")
NoFall = soup.find_all("div", {"id":"Kendo_Table1535711951642"})
days_list = []
for AuxCopy in NoFall:
    product = AuxCopy.find('table').find_all('tr')
    for tr in product:
        td = tr.find('td', {"data-label":"Fallen Behind Days"})
        if td:
            day = int(td.text.strip())
            days_list.append(day)
if days_list:
    print("最大值：", max(days_list))
else:
    print("未找到有效数据")

输出结果：

最大值： 6

内容的提问来源于stack exchange，提问作者Iván Magaña