AttributeError: module 'exoplanet' has no attribute 'get_dense_nuts_step'

[sukanyaX]

In trying to run The Joker, I encountered this error, specifically in this code snippet when I try to make the corner plot -

trace = pm.sample(
tune=500, draws=1000,
start=mcmc_init,
step=xo.get_dense_nuts_step(target_accept=0.95),
random_seed=seed,
cores=1, chains=2)

• Version of exoplanet: 0.5.2
• Operating system: Mac OS Big Sur 11.2.2
• python 3.9.6, installed via pip.

Thanks for your help!

[dfm]

That method has long been deprecated. Depending on the version of PyMC3 that you're using, you can use init="adapt_full" instead of step=, or the sample function from https://github.com/exoplanet-dev/pymc3-ext (without the step argument... everything else should work)

Hope this helps!