Lorenzo Di Gregorio wrote:
> Hi,
>
> I'm wondering what would be the preferred way to solve the following
> forward reference problem:
You don't actually explain what is the problem. Fortunately, I'm good at
guessing, and I think I can guess what your problem is (see below):
> ---------------------------------------
> class BaseA(object):
> def __init__(self):
> return
>
> class DebugA(BaseA):
> def __init__(self):
> return
>
> # here I would have a prototype of class A which is the same as class
> BaseA
>
> class B(object):
> def __init__(self):
> self.obj = A()
> return
>
> if __name__ == "__main__":
> # class A(BaseA): # Uncomment this for using BaseA objects
> # pass
> class A(DebugA): # Uncomment this for using DebugA objects
> pass
> ---------------------------------------
Class A only gets defined if you run the module as a script. What you need
is to unconditionally define class A, outside of the if __name__ block:
class A(BaseA):
pass
# A.__base__ = DebugA ## Uncomment this line for debugging.
--
Steven
--
http://mail.python.org/mailman/listinfo/python-list
