# -*- encoding: iso-8859-15 -*-
class Personne:
    def __init__(self,nom,age):
        self.nom = nom
        self.age = age
        
    def anniversaire(self):
        self.age+=1

class Retourner:
    def __init__(self, object):
        self.object = object

    def __getattr__(self, name):
        def proxy(*args, **kwds):
            getattr(self.object, name)(*args, **kwds)
            return self.object
        return proxy
    
class Etudiant(Personne):
    
    def __init__(self,nom,age,section):
        Personne.__init__(self,nom,age) # heritage
        self.section=section

    def __str__(self):
        out = "Etudiant %s a %d et est en section: %s\n" % (self.nom, self.age,self.section)
        return out

    def __cmp__(self,e2):
        return cmp(self.age,e2.age)

    def changeSection(self, nouvelleSection):
        self.section=nouvelleSection

etudiants=[]

def afficheEtudiants():
    print "Listes des étudiants:\n"
    for etud in etudiants:
        print "\t", etud
        
toto = Etudiant("Toto",23,"SSC")
print toto
toto.anniversaire()
toto.changeSection("INF")
print toto

titi = Etudiant("Titi",22,"SSC")
tata = Etudiant("Tata",25,"SSC")

etudiants=[toto,titi,tata]
print etudiants.sort()

etudiants=[toto,titi,tata]
etudiants = Retourner(etudiants).sort()
afficheEtudiants()