Problem Description
After running df.groupby([‘id’])[‘click’].agg({‘click_std’: ‘std’}).reset_index(), I get nested renamer is not supported python error

Solution
In the new Pandas version, the dictionary approach of {‘click_std’:’std’} has been abandoned in favor of df.groupby([‘id ‘])[‘click’].agg(click_std=’std’).reset_index() and then run successfully.

Reference:

https://stackoverflow.com/questions/60229375/solution-for-specificationerror-nested-renamer-is-not-supported-while-agg-alo

https://pandas.pydata.org/pandas-docs/stable/whatsnew/v0.20.0.html#whatsnew-0200-api-breaking-deprecate-group-agg-dict

https://pandas.pydata.org/pandas-docs/stable/whatsnew/v0.25.0.html