[Tutor] Dynamic inheritance?

[Danny Yoo]

On Sat, 19 Nov 2005, Jan Eden wrote:

> I have a number of classes, each of which should inherit from a related
> superclass in another module:
>
> class A(Super.A):
>     ...
>
> class B(Super.B):
>     ...
>
> class C(Super.C):
>     ...
>
> Is there a way to dynamically determine the value of Super at runtime?


Here's a small example that shows how classes can be treated just like any
other value in Python:

#########################################
def makeYa(superclass):
    class Ya(superclass):
        def sayHi(self):
            superclass.sayHi(self)
            print "ya"
    return Ya

class ValleyPerson:
    def sayHi(self):
        print "like, so, oh my gosh, hi?"

FrankensteinClass = makeYa(ValleyPerson)
instance = FrankensteinClass()
instance.sayHi()
#########################################

So there's no need to do trickery with conditional imports; Python treats
classes as first-class objects that can be passed around.


Best of wishes!