code: def _netid_subscription_url(netid, subscription_codes):
      
      return "{0}/{1}/subscription/{2}".format(
          url_base(), netid,
          (','.join([str(n) for n in subscription_codes])
           if isinstance(subscription_codes, (list, tuple))
           else subscription_codes))
docs: Return UWNetId resource for provided netid and subscription
      code or code list