How to copy all properties of an object to another object, in Python?

Question

Is there a library method to copy all the properties between two (already present) instances of the same class, in Python?

I mean, something like Apache Commons\'

Answer 1

If you have to do this, I guess the nicest way is to have a class attribute something like :

Class Copyable(object):
    copyable_attributes = ('an_attribute', 'another_attribute')

Then iterate them explicitly and use setattr(new, attr, getattr(old, attr)). I still believe it can be solved with a better design though, and don't recommend it.