How to print and save rhat and ess for pyStan 3.5?

Hi! I am new to pyStan3.5. I noticed that the summary of the fitted model does not include rhat and ess anymore. Are there any other functions to print and save these two quantities? Thanks!

Have you tried ArviZ?

import arviz as az

# pandas DataFrame
summary = az.summary(fit)

Yeah it works! Thanks!