Lorenzo Di Gregorio wrote:
Hi,
I'm wondering what would be the preferred way to solve the following
forward reference problem:
---------------------------------------
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
---------------------------------------
I can figure out some ways to fix this but none seems satisfying.
Either they are too specific or too cumbersome.
A runtime redefinition of class A does not seem to work either.
What would be the most "pythonesque" solution other than sorting out
the class order?
Best Regards,
Lorenzo
You haven't shown us any problem. class B works fine with a forward
reference to A. Now if you were trying to subclass A before defining
it, that'd be a problem. Or if you were trying to make an instance of B
before defining A.
Better put some code together with enough meat to actually show a
symptom. And tell us what sys.version says. I'm testing with 2.6.2
(r262:71605, Apr 14 2009, 22:40:02) [MSC v.1500 32 bit (Intel)], running
on Win XP.
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