如何使用key
函数的min
参数来比较对象的1属性列表?
例子
class SpecialNumber:
def __init__(self, i):
self.number = i
li = [SpecialNumber(1), SpecialNumber(3), SpecialNumber(2)]
最佳答案
http://docs.python.org/library/operator.html#operator.attrgetter
from operator import attrgetter
min_num = min(li,key=attrgetter('number'))
互动 session 示例:
>>> li = [SpecialNumber(1), SpecialNumber(3), SpecialNumber(2)]
>>> [i.number for i in li]
[1, 3, 2]
>>> min_num = min(li,key=attrgetter('number'))
>>> print min_num.number
1
关于python - 带有对象列表的Python min函数,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/6085467/