突然发现Python属性是比较有意思的，属性是继承的，先看下面代码:
38 class ABeen(object): 39 def f(self): 40 return " abeen " 41 g = property(f) 42 43 class Shan(ABeen): 44 def f(self): 45 return " shanshan " 46 47 s = Shan() 48 print s.g
out: abeen
是不是和你想象的不一样呢？其实g属性是在ABeen类语句执行的时候，通过传递函数对象f创建的，虽然Shan类语句在执行的时候重新定义了函数f,
但这与属性无关，因为属性不执行对这个名称的查找，而是使用在创建时使用的函数对象。
要实现我们想象中的行为，可以借"猪"一个中间层来实现，下面 getf 就是我们借的“猪”了 哈哈！
4 class ABeen(object): 5 def f(self): 6 return " abeen " 7 8 def getf(self): 9 return self.f() 10 11 g = property(getf) 12 13 class Shan(ABeen): 14 def f(self): 15 return " shanshan " 16 17 s = Shan() 18 print s.g
静态方法
4 class AClass(object): 5 def astatic(): 6 print " a static method by abeen shanshan " 7 8 astatic = staticmethod(astatic) 9 10 class BClass(AClass): 11 pass 14 o = AClass() 15 o.astatic() 16 AClass.astatic() 17 18 b = BClass() 19 b.astatic()
类方法
22 class ATest(object): 23 def aclassmethod(cls): 24 print ' a class method for ' , cls. __name__ 25 aclassmethod = classmethod(aclassmethod) 26 27 class BTest(ATest): 28 pass 29 32 t = ATest() 33 t.aclassmethod() 34 ATest.aclassmethod() 35 36 bt = BTest() 37 bt.aclassmethod() 38 BTest.aclassmethod()
静态方法和类方法，也可以如下更简单的方式实现（在方面前面加@staticmethod/classmethod）
实际上就是个装饰器
4 class AClass(object): 5 def astatic(): 6 print " a static method by abeen shanshan " 7 astatic = staticmethod(astatic) 8 9 @staticmethod 10 def bstatic(): 11 print " b static method by abeen shanshan " 26 class ATest(object): 27 def aclassmethod(cls): 28 print ' a class method for ' , cls. __name__ 29 aclassmethod = classmethod(aclassmethod) 30 31 @classmethod 32 def bclassmethod(self): 33 print " b classmethod "