On Oct 5, 7:56 pm, menomnon <p...@well.com> wrote: > Does python have a ‘once’ (per class) feature? > > ‘Once’, as I’ve know it is in Eiffel. May be in Java don’t. > > The first time you instantiate a given class into an object it > constructs, say, a dictionary containing static information. In my > case static is information that may change once a week at the most and > there’s no need to be refreshing this data during a single running of > the program (currently maybe 30 minutes). > > So you instantiate the same class into a second object, but instead of > going to the databases again and recreating the same dictionary a > second time, you get a pointer or reference to the one already created > in the first object – copies into the second object that is. And the > dictionary, no matter how many instances of the object you make, is > always the same one from the first object. > > So, as we put it, once per class and not object. > > Saves on both time and space.
Sounds like Borg Pattern: http://code.activestate.com/recipes/66531/ Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
