Need a spider library

[Laszlo Zsolt Nagy]

Hi All,

I'm writting a spider program. I need to go to serveral URLs and extract
information from the HTML source. Including links.
I was using FancyURLOpener and my own function that extracts the links
from a HTML page. The problem is that I always
need to change it. This is because some sites use lower case tag names,
others upper case tag names. Some of them use
href="page.html " others do it without the quotation href=page.html but
I could even find unclosed quotations <a href="page.html >
double opened and unclosed <a tags etc. There are many kinds of
malformed HTML pages out there and it seems I'm not capable
of handling all of them. The question: is there a good library for
Python for extraction links and images out of (possibly malformed)
HTML soucre code? Like the "references " function in Lynx. I need to
handle relative and absolute references and I need to know the
anchor text too and the position of the anchor inside the HTML source file.

For example this malformed link:

<a href="page.html >Sample link</a>

could be converted to:

['page.html','ht tp://samplesite.curr ent_location/page.html','Sam le link']

Thanks in advance

Les