I found a dynamic way to inherite classes:
def MixIn(pyClass, mixInClass):
if mixInClass not in pyClass.__bases__:
pyClass.__bases__ += (mixInClass,)
def test1():
o = C3()
MixIn(C3,C1)
MixIn(C3,C2)
o.m()
"expected aaa"
neoedmund wrote:
> 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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