code: def stats_send(self, template, start_date, end_date, options=None):
          
          options = options or {}
          data = options.copy()
          data = {'template': template,
                  'start_date': start_date,
                  'end_date': end_date
                  }
          data['stat'] = 'send'
          return self._stats(data)
docs: Retrieve information about a particular transactional or aggregated information
          from transactionals from that template over a specified date range.
          http://docs.sailthru.com/api/stat