Hi

When trying to extract the title of a html-page I have always used the following regex:

(?<=<title.*>)([\s\S]*)(?=</title>)

Which will extract everything between the tags in a document and ignore the tags themselves. However, when trying to use this regex in Python it raises the following Exception:

Traceback (most recent call last):
File "test.py", line 21, in pattern = re.compile('(?<=)([\s\S]*)(?=)') File "C:\Python31\lib\re.py", line 205, in compile return _compile(pattern, flags) File "C:\Python31\lib\re.py", line 273, in _compile p = sre_compile.compile(pattern, flags) File "C:\Python31\lib\sre_compile.py", line 495, in compile code = _code(p, flags) File "C:\Python31\lib\sre_compile.py", line 480, in _code _compile(code, p.data, flags) File "C:\Python31\lib\sre_compile.py", line 115, in _compile raise error("look-behind requires fixed-width pattern") sre_constants.error: look-behind requires fixed-width pattern

The code I am using is:

pattern = re.compile('(?<=<title.*>)([\s\S]*)(?=</title>)')
m = pattern.search(f)

if I do some minimal adjustments it works:

pattern = re.compile('(?<=<title>)([\s\S]*)(?=</title>)')
m = pattern.search(f)

This will, however, not take into account potential html titles that for some reason have attributes or similar.

Anyone know a good workaround for this issue? Any tips are appreciated.