az.compare giving me error message - "You can only assign a scalar value not a <class 'tuple'>"

[PPatty666]

Describe the bug
I am learning Bayesian Analysis with Python - 2nd Edition. In the code example from chapter 5 - Model Comparison, az.compare give me an error message saying "You can only assign a scalar value not a <class 'tuple'>".

I attached an pdf with the codes, error messages and my notes. Thank you very much for helping me with this!

To Reproduce
I downloaded the code from here --

https://github.com/aloctavodia/BAP

and installed pymc3 to run the codes.

Expected behavior
I want to have a table like --

Additional context
For pymc3 installation, I followed the Method 1 from here --

pymc-devs/pymc#4937

(Method 2 in that link worked for me before but doesn't work now just FYI.)

from my conda list, I have --
arviz 0.12.1
pymc3 3.11.5

Thank you so very much again. Greatly appreciate it!
az.compare_error_Patty-20230509.pdf

[OriolAbril]

what is your pandas version?

[PPatty666]

what is your pandas version?

Hello! I have "pandas 2.0.1" listed on my conda list.

[OriolAbril]

Can you try if the error persists with pandas<2 and if it still doesn't work with pandas 1.4.2? (1.4.2 is the version released around the months previous to arviz 0.12)

[PPatty666]

Can you try if the error persists with pandas<2 and if it still doesn't work with pandas 1.4.2? (1.4.2 is the version released around the months previous to arviz 0.12)

Hello! I just tried and it worked! Thank you so so much 👍