程式碼如下：

#encoding=utf-8

print '中國'

#根據物件的屬性將物件排序

def sort_by_attr(seq,attr):
    intermed=[(getattr(x,attr),i,x) for i,x in enumerate(seq)]
    intermed.sort()
    return [x[-1] for x in intermed]

def sort_by_attr_inplace(lst,attr):
    lst[:]=sort_by_attr(lst,attr)
    

#DSU內部方式
import operator

def sort_by_attr2(seq,attr):
    return sorted(seq,key=operator.attrgetter(attr))

def sort_by_attr_inplace2(lst,attr):
    lst.sort(key=operator.attrgetter(attr))
    
class Person:
    def __init__(self,name,pID):
        self.name=name
        self.pID=pID
    def printme(self):
        print self.name,self.pID
 
def printPer(lst):
    for per in lst:
        per.printme()    
           
lsta=[Person('hyj',1),Person('abc',2),Person('def',3)]

printPer(lsta)

print '-----sort_by_attr'
lstb=sort_by_attr(lsta,'name')
printPer(lstb)

print '-----sort_by_attr_inplace'
sort_by_attr_inplace(lsta,'name')

printPer(lsta)

print '-----sort_by_attr2'
listb=sort_by_attr2(lsta,'pID')
printPer(listb)

print '-----sort_by_attr_inplace2'
sort_by_attr_inplace2(lsta,'pID')

printPer(lsta)
 

中國
hyj 1
abc 2
def 3
-----sort_by_attr
abc 2
def 3
hyj 1
-----sort_by_attr_inplace
abc 2
def 3
hyj 1
-----sort_by_attr2
hyj 1
abc 2
def 3
-----sort_by_attr_inplace2
hyj 1
abc 2
def 3