Best way to create a class dynamically on the fly?
aleax at aleax.it
Mon Sep 30 11:00:45 CEST 2002
Robert Oschler wrote:
> I forgot to mention, I would like the classes I create dynamically to be
> fully "pickle-able". If there are any caveats or limitations in this area
> please let me know.
Classes are pickled by name (assuming that using modules pickle or cPickle
as they stand is what you mean by "fully pickle-able"). So, in general,
classes you pickle (or, classes whose instance you pickle) must be
top-level names exported by some module. Dynamically created classes
obviously don't qualify -- saving all the data needed to recreate such
classes, and recreating them just as dynamically when unpickled, is a
harder problem. You can register your own arbitrary factories for
unpickling, but I don't know if that satisfies your criteria for "fully
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