python - 为什么 Python 正则表达式不能处理格式化的 HTML 字符串？

Question

from bs4 import BeautifulSoup
import urllib
import re

soup = urllib.urlopen("http://atlanta.craigslist.org/cto/")
soup = BeautifulSoup(soup)
souped = soup.p
print souped
m = re.search("\\$.",souped)
print m.group(0)

我可以很好地下载并打印出 html，但是当我添加最后两行时它总是中断。

我收到这个错误:

Traceback (most recent call last):
  File "C:\Python27\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py", line 323, in RunScript
    debugger.run(codeObject, __main__.__dict__, start_stepping=0)
  File "C:\Python27\Lib\site-packages\pythonwin\pywin\debugger\__init__.py", line 60, in run
    _GetCurrentDebugger().run(cmd, globals,locals, start_stepping)
  File "C:\Python27\Lib\site-packages\pythonwin\pywin\debugger\debugger.py", line 655, in run
    exec cmd in globals, locals
  File "C:\Users\Zack\Documents\Scripto.py", line 1, in <module>
    from bs4 import BeautifulSoup
  File "C:\Python27\lib\re.py", line 142, in search
    return _compile(pattern, flags).search(string)
TypeError: expected string or buffer

非常感谢!

Answer 1

您可能需要 re.search("\\$.", str(souped))。