class Program(object):
def __init__(self,name,age,weigth):
self.name=name
self._age=age
self.__weight=weigth
def getWeight(self):
return self.__weight
if __name__ == '__main__':
a=Program("alex",23,45)
print a
print dir(a)
print a.getWeight()
print a._Program__weight#python 的私有属性的定义