code: def friends_description(baseURLs):
      
      friends = Element(etree.QName(NS_FRIENDS[None], 'friends'),
                        nsmap=NS_FRIENDS)
      friends.set(etree.QName(ns['xsi'], 'schemaLocation'),
                  '{0} {1}'.format(FRIENDS_SCHEMA_LOCATION,
                                   FRIENDS_SCHEMA_LOCATION_XSD))
      for baseURL in baseURLs:
          friends.append(E('baseURL', baseURL))
      return etree.tostring(friends, pretty_print=True)
docs: Generate the friends element for the identify response.
  
      The friends container is recommended for use by repositories
      to list confederate repositories.
      For the schema definition visit:
      http://www.openarchives.org/OAI/2.0/guidelines-friends.htm