如何通過python中的屬性值對對象的字典進行排序？

Question

我想遍歷對象的字典中的屬性附加傷害排序方式

import operator 

class Student: 
     def __init__(self, name, grade, age): 
       self.name = name 
       self.grade = grade 
       self.age = age 


studi1=Student('john', 'A', 15) 
studi2=Student('dave', 'B', 10) 
studi3=Student('jane', 'B', 12) 

student_Dict = {} 
student_Dict[studi1.name]=studi1 
student_Dict[studi2.name]=studi2 
student_Dict[studi3.name]=studi3 

for key in (sorted(student_Dict, key=operator.attrgetter('age'))): 
    print(key) 

這給了我eror消息：「AttributeError的：‘海峽’對象有沒有屬性‘年齡’」

Answer 1

for student in (sorted(student_Dict.values(), key=operator.attrgetter('age'))): 
    print(student.name) 

Answer 2

如何被顯示sorted方法

sorted(student_Dict.keys(), key=lambda student: student.age) 

Answer 3

>>> for key in sorted(student_Dict, key = lambda name: student_Dict[name].age): 
...  print key 
... 
dave 
jane 
john 

Answer 4

012的文檔中

來源：https://wiki.python.org/moin/HowTo/Sorting