继续说python类～

print "=="*10class C:    print "helloWorld!"print "=="*10class Filter:    def init(self):        self.blocked = []    def filter(self, sequence):        return [x for x in sequence if x not in self.blocked]class SPAMFilter(Filter):    def init(self):        self.blocked = ['SPAM']f = Filter()f.init()print f.filter([1,2,3])fNew = SPAMFilter()fNew.init()print fNew.filter(['SPAM','123','789'])print issubclass(SPAMFilter,Filter)print SPAMFilter.__bases__print isinstance(fNew,SPAMFilter)print isinstance(fNew,Filter)print "Done!Tada!!"

重点是类的继承和几个内建函数：issubclass isinstance

输出结果是：

====================
helloWorld!
====================
[1, 2, 3]
['123', '789']
True
(<class __main__.Filter at 0x1100d7b48>,)
True
True
Done!Tada!!