text: import re
  from urllib2 import urlopen
  from .feed import Feed
  
  class StatusPage(object):
      """
      This class wraps access to Amazon status page and can be used to retrieve
      all available RSS feeds, and through these feeds monitored regions and
      services.
      It may be used to automatically discover new available feeds for instance,
      or for checking regions/services list.
      """
      BASE_URL = 'http://status.aws.amazon.com/'
      RSS_RE = r'href="/?(?P<feed_url>rss/[^"]+\.rss)"'
  
      def __init__(self):
          self.page_source = None
          self.feeds = set()
          self.rss_urls = set()
          self.services = set()
          self.regions = set()
          self.parse_page()
  
      def page(self):
          if not self.page_source:
              self.page_source = urlopen(self.BASE_URL)
          return self.page_source
  
      def parse_page(self):
          page_content = self.page().read()
          for match in re.finditer(self.RSS_RE, page_content):
              absolute_url = self.BASE_URL + match.group('feed_url')
              feed = Feed(absolute_url)
              self.feeds.add(feed)
              self.rss_urls.add(feed.url)
              if feed.service:
                  self.services.add(feed.service)
              if feed.region:
                  self.regions.add(feed.region)
  
  