Fix dynamic rulebook example

[dfremont]

No description provided.

[kevinchang73]

Hi @dfremont, I ran into the following error while executing run_multi_dynamic.sh:

AttributeError: 'LateFeatureSampler' object has no attribute 'nextSample'. Did you mean: 'getSample'?

It looks like there's an API mismatch between VerifAI and Scenic. Specifically, verifai.samplers.feature_sampler.LateFeatureSampler uses getSample(), but scenic.core.external_params.VerifaiSampler is calling nextSample().

[dfremont]

Hi Kai-Chun, that error indicates that you're using an old version of Scenic. Can you please try installing the latest version (3.1.1) and see if that fixes the problem? If so, I'll update pyproject.toml to require that version (I think I'd held off before because I hadn't yet made a new Scenic release).

[kevinchang73]

Hi @dfremont, I installed the latest version of Scenic (3.1.1) using pip, but the issue still persists.
However, it does work correctly if I install it from source using the main branch of the GitHub repo. Is this expected?

[Eric-Vin]

Hi @kevinchang73, this is expected, as the API changes I made for VerifAI 3.0 were after the last PyPi release of Scenic and so are only present on GitHub right now.

[kevinchang73]

I see. Then I'll approve the pull request.