How do I merge two datasets with on BusinessID and get the final dataset?

Question

It is two datasets business and review files. how to group the multiple reviews on business_id to get all reviews given by the user into one text .

How to merge the datasets with BusinessID and get the final dataset as the picture below?

How can I do this with the Pandas library?

Answer 1

You can merge df1 (top-left) with a .groupby version of df2 (top-right):

df3 = df1.merge(df2.groupby('Business_id')['Review_text'].apply(list).reset_index(),
               how='left', on='Business_id').rename({'Review_text':'All_reviews'}, axis=1)

Out[1]: 
   Business_id       category  star  Review_count               All_reviews
0            1       shopping   3.5             3  [Text_1, Text_2, Text_4]
1            2     restaurant   5.0             1          [Text_3, Text_5]
2            3  Home services   4.0             6                       NaN