# coding=utf-8 d = {'john': 22, 'ringo': 22, 'paul': 20, 'george': 19} # 昇順 assert sorted(d.items(), key=lambda x: x[1]) \ == [('george', 19), ('paul', 20), ('ringo', 22), ('john', 22)] # 降順 assert sorted(d.items(), key=lambda x: x[1], reverse=True) \ == [('ringo', 22), ('john', 22), ('paul', 20), ('george', 19)]