python - Add columns from another dataframe based on common values

Question

I have two different dataframes.

product_ID	product_score	product_number_reviews	user_ID	user_review_recommended
125	78	105	45840	True
7302	65.0	3510	4871	True
7302	65.0	3510	1251	False
7302	65.0	3510	125	True
154	57	51	8525	True
18	28	8	8525	False

question from:https://stackoverflow.com/questions/65859773/add-columns-from-another-dataframe-based-on-common-values

Answer 1

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