What's my best bet for parsing HTML if I can't use BeautifulSoup or lxml? I've got some code that uses SGMLlib but it's a bit low-level and it's now deprecated.
I would prefer if it could stomache a bit of malformed HTML although I'm pretty sure most of the input will be pretty clean.
You can install lxml and many other python modules easily and seamlessly on the Mac (OS X) using Pallet, which is the MacPorts official GUI
The module name is py27-lxml. Easy as 1,2,3.
html5lib is good:
http://code.google.com/p/html5lib/
Update: The link above is broken. A third-party mirror of above, can be accessed from https://github.com/html5lib/gcode-import
http://www.xmlhack.com/read.php?item=1392 http://sourceforge.net/projects/pirxx/
http://pyxml.sourceforge.net/topics/
I don't have much experience with python, but I have used Xerces (from the Apache foundation) in the past and found it to be very useful. The learning curve isn't bad either, though I'm not coming from a python perspective. I suggest you consider it though. (The first two links I've included discuss python interfaces to Xerces and the last one is the first google hit on "python xml").
htql is good at handling malformed html:
http://htql.net/
Perhaps µTidylib will meet your needs?
Python has a native HTML parser, however the Tidy wrapper Nick suggested would probably be a solid choice as well. Tidy is a very common library, (written in C is it?)