这个站点上有多个<a>元素没有href，所以在这种情况下link.get('href')将返回None。你不能在None上调用startswith()，所以你必须添加一个检查href是否是None：

import requests
from bs4 import BeautifulSoup

url = 'https://www.ilga.gov/legislation/default.asp'
response = requests.get(url)
soup = BeautifulSoup(response.text, 'html.parser')

# Find the House Bills section
house_bills = soup.find('a', {"name": "h_bills"}).parent

# Iterate through all links in the House Bills section
for link in house_bills.find_all('a'):
    href = link.get('href')
    if not href:
        continue  # Ignore links without href
    if href.startswith('/legislation/BillStatus.asp?'):
        bill_url = url + href
        bill_response = requests.get(bill_url)
        bill_soup = BeautifulSoup(bill_response.content, 'html.parser')

        # Find the table cell with width
        td = bill_soup.find('td', {'width': '100%'})
        
        # Iterate through all the <li> elements in table
        for li in td.find_all('li'):
            print(li.text)

另外，您混淆了URL：首先，你需要打开“grplist.asp”，然后链接以“BillStatus.asp”开头。要只访问房屋账单部分的链接，你需要选择a后面的div，名称为h_bills，而不是它的父节点。我还修改了你的代码，这样bill_url就不再是从包括“/default.asp”在内的完整URL构建的了。

import requests
from bs4 import BeautifulSoup

url = 'https://www.ilga.gov/legislation/default.asp'
response = requests.get(url)
soup = BeautifulSoup(response.text, 'html.parser')

# Find the House Bills section (next div after a with name "h_bills")
house_bills = soup.find('a', {"name": "h_bills"}).find_next_sibling("div")

# Iterate through all links in the House Bills section
for link in house_bills.find_all('a'):
    href = link.get('href')
    if not href:
        continue  # Ignore links without href

    if href.startswith('grplist.asp?'):
        bill_url = "https://www.ilga.gov/legislation/" + href

        bill_response = requests.get(bill_url)
        if bill_response.status_code != 200:  # Prevent crash when response is not valid
            continue

        bill_soup = BeautifulSoup(bill_response.content, 'html.parser')

        # Find the table cell with width
        td = bill_soup.find('td', {'width': '100%'})
        
        # Iterate through all the <li> elements in table
        for li in td.find_all('li'):
            print(li.text)