how to load html page variable into python variable using the web address

I found a guide here: http://ift.tt/1hs6bpS but the function HTMLParser.feed(data) uses data as the html itself.

There is a way to do similar feed but only with the web address ? something like this ... HTMLParser.feed("www.a.com") ?

Generally, i want to take a variable from different web pages and load it into python variable with python script and compere between them.

Thanks.