trouble understanding inheritance...

[KraftDiner]

Simon Forman wrote:
> KraftDiner wrote:
> > Fredrik Lundh wrote:
> > > KraftDiner wrote:
> > >
> > > > This is not working the way I think it should....
> > > > it would appear that fromfile and getName are calling the baseClass
> > > > methods which are
> > > > simple passes.... What have I done wrong?
> > > >
> > > > class baseClass:
> > > > 	def __init__(self, type):
> > > > 		if type == 'A':
> > > > 			self = typeA()
> > > > 		else:
> > > > 			self = typeB()
> > >
> > > __init__ is not a constructor, and assigning to self doesn't change the
> > > type of the constructed object.
> > >
> > > looks like you need to get a better tutorial.
> > >
> > > </F>
> >
> > Well how does one select which class baseClass really is when you
> > contruct the object?
> > What am I missing?
> >
> > a = typeA()
> > b = typeB()
> > c = baseClass(a)
>
> a = typeA()
> b = typeB()
>
> You're done. Stop there.
>
I can see that this might work...
c = [a, b]
for c in [a,b]:
   c.getName()

but when does baseClass ever get used?
Why did i even have to define it?



> You can't "select which class baseClass really is"-- it really is
> baseClass.  You "select" which class your object is by choosing which
> class to use to construct the object.
> 
> HTH,
> ~Simon