> Does it make sense to do this:
That depends on what you are trying to do!
If its to make scrambled eggs thewn nope, no sense
whatsoever, but if writing a programme storing an
instance inside another instance is very common
indeed! :-)
> In [2]: class AB:
> ...: pass
> ...:
> In [3]: a = AB()
>
> In [5]: class BC:
> ...: def __init__(self, foo):
> ...: self.foo = foo
>
> In [6]: b = BC(a)
Indeed you can even store a class inside an object:
class C:
def shout(self): print 'HELLO! from C'
class D:
def shout(self): print 'HELLO! from D'
class A:
def __init__(self,cls):
self.c = cls
def speak(self):
print 'I'm an A but I have an object that says:'
self.c().shout()
a = A(C)
b = A(D)
a.speak()
b.speak()
More commonly a method of A could also be created that
returned an instance of C with certain A specific values.
The point of the example being simply that you can quite reasonably
pass any PYthon object to a class/instance and it can be stored
and later used or returned.
You can see a practical example of storing a class reference
within an object in my Games Framework, described in the book
of my tutorial (and the code is on Useless Python).
HTH
Alan G
Author of the Learn to Program web tutor
http://www.freenetpages.co.uk/hp/alan.gauld
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