version print and citations failing (limb darkening, fatal)

[alexteachey]

I'm following the transit fitting demo here. I am running the latest version of exoplanet, and I don't see any dependency conflicts / breakdowns in the traceback. Happy to provide any information you think might be relevant. Thanks in advance for any thoughts / suggestions / fixes.

Running into two issues. The first is less serious than the second.

1) Printing the exoplanet version results in a failure.

exoplanet.utils.docs_setup()
print(f"exoplanet.__version__ = '{exoplanet.__version__}'")

Throws an error: AttributeError: module 'exoplanet.utils' has no attribute 'docs_setup'

2) A more serious breakdown occurs when limb darkening is invoked -- it can't find the citation, so the model can't be generated. The breakdown occurs here:

    # Compute a limb-darkened light curve using starry 
    t = np.linspace(-0.1, 0.1, 1000) 
    u = [0.3, 0.2] 
    light_curve = ( 
        xo.LimbDarkLightCurve(*u)
        .get_light_curve(orbit=orbit, r=0.1, t=t, texp=0.02) 
        .eval()
    ) 

Just copy/pasted from the demo. Results in:

----> 1 exec(open('dfm_exoplanet_transit_modeling_demo.py').read())

<string> in <module>

~/anaconda3/envs/dfm_exoplanet2/lib/python3.8/site-packages/exoplanet/light_curves/limb_dark.py in __init__(self, u, model)
     24 
     25     def __init__(self, u, model=None):`
---> 26         add_citations_to_model(self.__citations__, model=model)`
     27         self.u = as_tensor_variable(u)`
     28         u_ext = tt.concatenate([-1 + tt.zeros(1, dtype=self.u.dtype), self.u])`

~/anaconda3/envs/dfm_exoplanet2/lib/python3.8/site-packages/exoplanet/citations.py in add_citations_to_model(citations, model)`
     13         model = pm.modelcontext(model)`
     14         if not hasattr(model, "__citations__"):`
---> 15             model.__citations__ = dict()`
     16         for k in citations:`
     17             model.__citations__[k] = CITATIONS[k]`

AttributeError: 'float' object has no attribute '__citations__'

[dfm]

Both of these error are coming from version mismatches between the tutorial that you're following and the version of exoplanet. The syntax you're using requires at least exoplanet v0.5.0, I think, and earlier versions would fail with these issues. So perhaps you need to upgrade?

[alexteachey]

Thanks Dan, I thought I had been working with the latest version but apparently not. That did the trick.