BeautifulSoup从表中提取数据，但当字段为空时，它不会注意到它

from bs4 import BeautifulSoup

# 假设HTML代码如下
html = '''
<table>
  <tr>
    <td>Name</td>
    <td>Age</td>
    <td>Country</td>
  </tr>
  <tr>
    <td>John Doe</td>
    <td>25</td>
    <td></td>
  </tr>
</table>
'''

# 创建BeautifulSoup对象
soup = BeautifulSoup(html, 'html.parser')

# 找到所有的<tr>标签
rows = soup.find_all('tr')

# 遍历每一行，并提取数据
for row in rows:
    # 找到当前行的所有<td>标签
    cells = row.find_all('td')
    
    # 提取每个字段的数据
    name = cells[0].text if cells[0].text else "N/A"
    age = cells[1].text if cells[1].text else "N/A"
    country = cells[2].text if cells[2].text else "N/A"
    
    # 处理空字段
    if name == "N/A" or age == "N/A" or country == "N/A":
        print("注意：字段为空！")
    
    # 打印提取的数据
    print("Name:", name)
    print("Age:", age)
    print("Country:", country)
    print("---")