pythonのいくつかの特性

class Student(object):

    say="this is a student class"

    def __init__(self,name,age):#   
        self.name  = name
        self.age = age

    @classmethod#   
    def showClassMethod(cls):
        print "call classmethod"
        print cls.say

    @staticmethod#    ，   
    def showStaticMethod():
        print "call static method"
        print Student.say


    @property#       
    def sex(self):
        print "call property"
        return self._sex

    @sex.setter#     sex
    def sex(self,value):
        print "call setter"
        self._sex = value

    def getSex(self):#    sex  
        return self._sex


    def showAll(self):#     
        print "call instance method"
        print self.age,self.name,self.sex,self.getSex()

    def __del__(self):#    
        print "call destructor"

    def __str__(self):#           
        return "student object:(name:%s)(age:%d)" % (self.name,self.age)

    def __repr__(self):#              ：s
        return self.__str__()

    def __getattr__(self, item):#        
        if item == "score":
            return lambda :99
        elif item == "dog":
            return "xiaohuang"
        else:
            raise "attr error"
    def __call__(self, *args, **kwargs): #    
        print "__call__ self:"
        for i in range(len(args)):#    
            print args[i]

        for i in kwargs:#     
            print i,kwargs[i]
        print "call:my name is zhengjinwei"



Student.showClassMethod() #     

s = Student("zhengjinwei",24)

s.sex = "male" #  sex    ，       Student      object       

s.grade = "1" #      
print s.grade

print s #   __str__

print s.score() #  __getattr__
print s.dog #  __getattr__

if callable(s):
    s(1,2,3,name="zjw",age=24) #   __call__

s.showClassMethod()
s.showStaticMethod()
s.showAll()

<span style="font-size:18px;">call classmethod
this is a student class
call setter
1
student object:(name:zhengjinwei)(age:24)
99
xiaohuang
__call__ self:
1
2
3
age 24
name zjw
call:my name is zhengjinwei
call classmethod
this is a student class
call static method
this is a student class
call instance method
24 zhengjinwei call property
male male
call destructor
</span>