On 10/29/2012 1:05 PM, andrea crotti wrote:
I meant how do I create new immutables classes myself, I guess that's possible writing C extensions but I don't see in pure Python..
If you mean class with immutable instances, mutate new instances in __new__ instead of __init__ and write a custom .__setattr__ that prevents changes thereafter.
If you want the class itself to be immutable (after creation), write a custom metaclass.
You may also need to think about .__getattribute__, but I never studied the detail completely and have forgotten what I learned.
-- Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
