python - Pandas: get Item ID of the most popular in a category (two Groupby level)

Question

I'm sorry that I cannot think of a title.

I have a DF like this:

item_cat1	item_id	item_count
A	1	2
B	2	5
A	3	4
C	4	2

question from:https://stackoverflow.com/questions/65931977/pandas-get-item-id-of-the-most-popular-in-a-category-two-groupby-level

Answer 1

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