继续说python类～

print "=="*10
class C:
    print "helloWorld!"

print "=="*10
class 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!!