gistfile1.rb

require "open-uri"
require "rubygems"
require "nokogiri"

url = 'http://ws.audioscrobbler.com/2.0/?method=user.gettopartists&user=palleas&api_key=99a9fb12391886a19391d92709401988&period=7days'

doc = Nokogiri::XML(open(url))

doc.xpath('//topartists/artist/name').each do |artist|
  name = artist.content
  puts 'Current arist = ' + name
end