python's OOP question

neoedmund neoedmund at gmail.com
Mon Oct 16 04:25:50 CEST 2006


thank you, Kay.

But i need a "dynamic" way. Say i have a existing class, and add some
method from other class into it.


Kay Schluehr wrote:
> neoedmund wrote:
> > There's a program, it's result is "unexpected aaa", i want it to be
> > "expected aaa". how to make it work?
> >
> > [code]
> >
> > class C1(object):
> > 	def v(self, o):
> > 		return "expected "+o
> >
> > class C2(object):
> > 	def v(self, o):
> > 		return "unexpected "+o
> > 	def m(self):
> > 		print self.v("aaa")
> >
> > class C3(object):
> > 	def nothing(self):
> > 		pass
> >
> > def test1():
> > 	o = C3()
> > 	setattr(o,"m",C2().m)
> > 	setattr(o,"v",C1().v)
> > 	o.m()
> >
> > test1()
> >
> > [/code]
>
> class C3(C1, C2):pass
>
> >>> C3.mro()  # shows method resolution order
> [<class '__main__.C3'>, <class '__main__.C1'>, <class '__main__.C2'>,
> <type 'object'>]
> 
> >>> o = C3()
> >>> o.m()
> expected aaa




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