code: def get_assignments(self, hit_id, status=None,
                              sort_by='SubmitTime', sort_direction='Ascending', 
                              page_size=10, page_number=1, response_groups=None):
          
          params = {'HITId' : hit_id,
                    'SortProperty' : sort_by,
                    'SortDirection' : sort_direction,
                    'PageSize' : page_size,
                    'PageNumber' : page_number}
  
          if status is not None:
              params['AssignmentStatus'] = status
  
          # Handle optional response groups argument
          if response_groups:
              self.build_list_params(params, response_groups, 'ResponseGroup')
                  
          return self._process_request('GetAssignmentsForHIT', params,
                                       [('Assignment', Assignment),])
docs: Retrieves completed assignments for a HIT. 
          Use this operation to retrieve the results for a HIT.
  
          The returned ResultSet will have the following attributes:
  
          NumResults
                  The number of assignments on the page in the filtered results
                  list, equivalent to the number of assignments being returned
                  by this call.
                  A non-negative integer
          PageNumber
                  The number of the page in the filtered results list being
                  returned.
                  A positive integer
          TotalNumResults
                  The total number of HITs in the filtered results list based
                  on this call.
                  A non-negative integer
  
          The ResultSet will contain zero or more Assignment objects