code: def results(self):
          "An iterable of all `(job-id, WorkResult)`s."
          cur = self._conn.cursor()
          rows = cur.execute("SELECT * FROM results")
          for row in rows:
              yield (row['job_id'], _row_to_work_result(row)f results(self):
          "An iterable of all `(job-id, WorkResult)`s."
          cur = self._conn.cursor()
          rows = cur.execute("SELECT * FROM results")
          for row in rows:
              yield (row['job_id'], _row_to_work_result(row))
docs: An iterable of all `(job-id, WorkResult)`s.