sorting a list with objects of a class as its items

Question

i have a python list whose items are objects of a class with various attributes such as birthday_score, anniversary_score , baby_score..... I want to to sort the list on the basis of one of these attributes ,say anniversary_score. How do i do it ?

Answer 1

your_list.sort(key = lambda x : x.anniversary_score)

或者如果属性名称是字符串,那么您可以使用:

import operator
your_list.sort(key=operator.attrgetter('anniversary_score'))

Answer 2

attrgetter 如果您事先不知道属性的名称(例如,可能来自文件或函数参数),则很方便

from operator import attrgetter

sorted(my_list, key=attrgetter('anniversary_score'))