由字典元素构成的列表的排序，方法如下：
dic1={"class":"b","age":18,"num":2} dic2={"class":"a","age":17,"num":7} dic3={"class":"c","age":16,"num":1} list=[] list.append(dic1) list.append(dic2) list.append(dic3) print(list) [{'class': 'b', 'age': 18, 'num': 2}, {'class': 'a', 'age': 17, 'num': 7}, {'class': 'c', 'age': 16, 'num': 1}] #把列表按class排序 list1=sorted(list,key=operator.itemgetter("class")) print(list1) #把列表按age排序 list1=sorted(list,key=operator.itemgetter("age")) print(list1) #把列表按num排序 list1=sorted(list,key=operator.itemgetter("num")) print(list1) [{'class': 'a', 'age': 17, 'num': 7}, {'class': 'b', 'age': 18, 'num': 2}, {'class': 'c', 'age': 16, 'num': 1}] [{'class': 'c', 'age': 16, 'num': 1}, {'class': 'a', 'age': 17, 'num': 7}, {'class': 'b', 'age': 18, 'num': 2}] [{'class': 'c', 'age': 16, 'num': 1}, {'class': 'b', 'age': 18, 'num': 2}, {'class': 'a', 'age': 17, 'num': 7}]``
