python中最后一个基础知识点，面向对象

'''
Created on 2011-9-30

@author: xgzhao
'''
class MyData():
    pass

#The instance attributes need not bo be defined in the class, just use it
mathObj = MyData();
mathObj.x = 3
mathObj.y = 4
print mathObj.x + mathObj.y
print mathObj.x * mathObj.y

class MyDataWithMethod():
    'the doc of this class'
    myData = 123
    def printFoo(self):
        print 'You invoked printFoo()'

mathMethod = MyDataWithMethod()
mathMethod.printFoo()

print MyDataWithMethod.__doc__
print MyDataWithMethod.__name__
print MyDataWithMethod.__dict__