Question about implementing immutability
On 2018-11-21 21:36, Calvin Spealman wrote:
> If you want to create your own immutable class, maybe inherit from a
If you're tempted to go down that route and can require Python 3.7, use
> On Wed, Nov 21, 2018 at 11:45 AM Iwo Herka <iwoherka at gmail.com> wrote:
>> Let's say I want to implement immutability for user-defined class.
>> More precisely, a class that can be modified only in its (or its
>> super-class') __init__ method. My initial idea was to do it the
>> following fashion:
>> def __setattr__(self, *args, **kwargs):
>> if sys._getframe(1).f_code.co_name == '__init__':
>> return super().__setattr__(*args, **kwargs)
>> raise AttributeError()
>> What do you think of this approach? Is there a better one?
>> Iwo Herka