How to set a class inheritance at instance creation?

[glomde]

On 29 Maj, 19:20, Ramashish Baranwal <ramashish.li... at gmail.com>
wrote:
> On May 29, 8:52 pm, glomde <tbr... at yahoo.com> wrote:
>
>
>
> > Hi I wonder if you can set what subclass a class should
> > have at instance creation.
>
> > The problem is that I have something like:
>
> > class CoreLang():
> >     def AssignVar(self, var, value):
> >          pass
>
> > class Lang1(CoreLang):
> >      def AssignVar(self, var, value):
> >           return var, "=", value
>
> > class Lang2(CoreLang):
> >      def AssignVar(self, var, value):
> >           return var, "<=", value
>
> > class WriteStruct():
> >      def Generate(self, vars):
> >         for var in vars:
> >              print self.AssignVar()
>
> > The problem is that I want  WriteStruct to sometimes be a subclass of
> > Lang1 and sometimes
> > of Lang2.
> > In the above example I could but the Generate Method in CoreLang. But
> > in my real
> > example I also want to able to subclass WriteStruct to be able to easy
> > customize WriteStruct.
> > Which I wouldnt be able to do if it was a method in CoreLang.
>
> > So in code I would like to write something like:
>
> > WriteStruct(Lang1).Generate(vars)
>
> class WriteStruct:
>     def __init__(self, SubClass):
>         self._sub = SubClass()
>     def Generate(self, vars):
>         for var in vars:
>             print self._sub.AssignVar()
>
> This does what you want but isn't inheritance.

This would work I think. Thanks.

>
> > Even better would be that if I in the Lang1 class could
> > just do WriteStruct().Generate(vars) and Lang1 class would
> > magically make WriteStruct a subclass of itself.
>
> I don't think I understood what you want here.
>
I just dont want to pass the class in the instancecreation.
Somhehow in my:

class Lang1(CoreLang):

  def Function(self):
     WriteStruct().Generate()

Then somehow this WriteStruct should magically know that has been
instantiated in Lang1.
But this is not really needed. Just wondered if it was possible.

> Ram