python - 强制转换为 Unicode : need string or buffer, 找到标记

Question

我正在尝试进行网络抓取并使用以下代码:

import mechanize
from bs4 import BeautifulSoup

url = "http://www.indianexpress.com/news/indian-actions-discriminating-against-us-exp/1131015/"
br =  mechanize.Browser()
htmltext = br.open(url).read()
articletext = ""
soup = BeautifulSoup(htmltext)
for tag in soup.findAll('p'):
    articletext += tag.contents[0]
print articletext

但我收到以下错误:

Traceback (most recent call last):
  File "C:/Python27/crawler/express.py", line 15, in <module>
    articletext += tag.contents[0]
TypeError: coercing to Unicode: need string or buffer, Tag found

谁能帮我解决这个错误，我是 Python 编程的新手。

Answer 1

对于至少一个 <p>找到标签，tag.contents[0]是 Tag对象，而不是文本。对于您找到的特定 URL，它是 <hr>标签:

>>> tag
<p><hr> </hr></p>

为什么不使用 tag.text而不是 tag.contents[0] ？

for tag in soup.findAll('p'):
    articletext += tag.text