code: def filters(self):
          
          results = []
          filters = self.qs.get('filter')
          if filters is not None:
              try:
                  results.extend(json.loads(filters))
              except (ValueError, TypeError):
                  raise InvalidFilters("Parse error")
          if self._get_key_values('filter['):
              results.extend(self._simple_filters(self._get_key_values('filter[')))
          return results
docs: Return filters from query string.
  
          :return list: filter information