which is best for a singleton, module or class?
Hung Jung Lu
hungjunglu at yahoo.com
Thu Nov 29 12:32:06 EST 2001
Peter Bismuti wrote:
> What is best for a singleton, making it a module or a class within a module?
> I guess the reason why having a class within a module undesirable is that it
> adds to the namespace of the object mymodule.mclass.property instead of
> mymodule.property, and so fourth. I know you can import it in a way to
> reduce the path length of the object, but still, it seems like a cleaner
> coding style to just use the module itself. Opinions? THanks.
You can simply put your object into the __builtins__ namespace:
#---------------------------------------
class Spam:
x = 0
def f(self):
print self.x
__builtins__.__dict__['eggs'] = Spam()
eggs.x = 1
eggs.f()
#---------------------------------------
Using modules is fine for singletons, but classes allows you things
like inheritance.
regards,
Hung Jung
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