old_contents: from corehq.apps.products.models import SQLProduct
  from custom.ewsghana.handlers import HELP_TEXT
  from custom.ilsgateway.tanzania.handlers.keyword import KeywordHandler
  
  
  class HelpHandler(KeywordHandler):
  
      def help(self):
          self.respond(HELP_TEXT)
  
      def handle(self):
          topic = self.args[0].lower()
          if topic == 'stock':
              self.respond("Please send your receipts in the format "
                           "' <Commodity code> <stock on hand > . <quantity received>'")
          elif topic == 'stop':
              self.respond("Text 'stop' to stop receiving text message reminders.")
          elif topic == 'start':
              self.respond("Text 'start' to get text message reminders every week to submit your stock reports.")
          elif 'code' in topic:
              codes = [c.code for c in SQLProduct.by_domain(self.domain).order_by('code')]
              self.respond("Available commodity codes: %(codes)s", codes=", ".join(codes))
          else:
              try:
                  sql_product = SQLProduct.objects.get(domain=self.domain, code=topic)
                  msg = "%s is the commodity code for %s" % (topic, sql_product.name)
                  if sql_product.units:
                      msg += " (%s)" % sql_product.units
                  if sql_product.description and sql_product.description not in sql_product.name:
                      msg += " %s" % sql_product.description
                  self.respond(msg)
              except SQLProduct.DoesNotExist:
                  self.help()
  
new_contents: from corehq.apps.products.models import SQLProduct
  from custom.ewsghana.handlers import HELP_TEXT
  from custom.ilsgateway.tanzania.handlers.keyword import KeywordHandler
  
  
  class HelpHandler(KeywordHandler):
  
      def help(self):
          self.respond(HELP_TEXT)
  
      def handle(self):
          topic = self.args[0].lower()
          if topic == 'stock':
              self.respond("Please send your receipts in the format "
                           "' <Commodity code> <stock on hand > . <quantity received>'")
          elif topic == 'stop':
              self.respond("Text 'stop' to stop receiving text message reminders.")
          elif topic == 'start':
              self.respond("Text 'start' to get text message reminders every week to submit your stock reports.")
          elif 'code' in topic:
              codes = SQLProduct.by_domain(self.domain).order_by('code').values_list('code', flat=True)
              self.respond("Available commodity codes: %(codes)s", codes=", ".join(codes))
          else:
              try:
                  sql_product = SQLProduct.objects.get(domain=self.domain, code=topic)
                  msg = "%s is the commodity code for %s" % (topic, sql_product.name)
                  if sql_product.units:
                      msg += " (%s)" % sql_product.units
                  if sql_product.description and sql_product.description not in sql_product.name:
                      msg += " %s" % sql_product.description
                  self.respond(msg)
              except SQLProduct.DoesNotExist:
                  self.help()
  
subject: Use values_list instead of iterating over