Pickle works with the old API not the new one

[Khalifa1997]

Whenever Pickle loads a saved Shogun model, it expects the model to be implemented using the old API this can be demonstrated here

I guess this is related to #4463

[karlnapf]

Could you post a minimal standalone python example on synthetic trivial data instead of the notebook? Thx

[Khalifa1997]

@karlnapf I have updated the link, now it's a python file using Shogun's data however you're going to have to edit the path to point to your shogun dir

[karlnapf]

thanks. that does it. (BTW standalone means no loading of files, or adjustment of paths, but one can run this straight away, but nevermind this is sufficient.)

[gf712]

Could you share Traceback if there is one please?

[Khalifa1997]

Could you share Traceback if there is one please?

@gf712 I have updated the gist

[karlnapf]

I think the offender is this hackery in swig/interfaces/SGBase.i

if isinstance(cls, str) and cls.startswith('shogun.'):
            if base is object:
                import shogun
                return eval(cls+'()')

Simple solution would be to replace it with the create method, but not sure that works with all cases of templated objects (although machines are rarely templated)

[gf712]

Which templated objects are you referring to? The template type is hidden from interfaces no?

[karlnapf]

Nevermind for now, I thought this could become a problem, but not sure anymore now, as the serialization and the new api have changed the picture. I guess someone will see when trying to fix this