AttributeError: 'StanModel' object has no attribute 'fit_class'

[nicholas-miles-brex]

pystan version: 2.19.1.1 prophet version: 1.0.0

I'm running a notebook that ran successfully previously but is suddenly throwing the following error: 'StanModel' object has no attribute 'fit_class'. Most of the issue reports that I've found related to using a different pystan version than 2.19.1.1, how can I fix the issue if I'm already running that version?

[tcuongd]

Hmm without more context, I think uninstalling and reinstalling is your best bet. That error is usually seen when the stan model hasn't compiled properly.

[rogerbock]

I am also getting this error. I have prophet==1.0, pystan==2.19.1.1, and gcc (GCC) 7.3.1 20180303 (Red Hat 7.3.1-5). I am seeing the issue in a freshly created Docker image, so I don't think uninstalling and reinstalling would help.

[rogerbock]

I figured out my issue - I was pulling a prebuilt Prophet wheel from my company-internal host. When I ran the below command to rebuild it from scratch, things worked as expected: RUN source /opt/rh/devtoolset-7/enable && pip install prophet --no-cache-dir --no-binary :all:

[WardBrian]

Closing due to PyStan no longer being a dependency of prophet