code: def parse_categories(self, markup):
          
          
          
          categories = []
          m = re.findall(self.re["category"], markup)
          for category in m:
              category = category.split("|")
              page = category[0].strip()
              display = u""
              if len(category) > 1: 
                  display = category[1].strip()
              #if not categories.has_key(page):
              #    categories[page] = WikipediaLink(page, u"", display)
              if not page in categories:
                  categories.append(page)
                  
          return categories
docs: Returns a list of categories the page belongs to.
  
          # A Wikipedia category link looks like:
          # [[Category:Computing]]
          # This indicates the page is included in the given category.
          # If "Category" is preceded by ":" this indicates a link to a category.