I've already tried using JSON but can't really read this page.
This is my python code. I've tried it on other websites and it works, but on this website it returns a 403.
import urllib2
req = urllib2.Request('http://www.taringa.net/envivo/ajax.php')
response = urllib2.urlopen(req)
the_page = response.read()
print the_page
You have to add the 'User-Agent' header in order to make this work.
Urllib code:
I would recommend that you use requests mainly because it makes this kind of stuff very easy.
Requests code: