Python Pandas join aggregated tables -

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i have data frame 2 columns: product_id , rating. i'm trying join 2 tables. 1 obtained from

a = data.groupby('product_id').count()

the other one

b = data.groupby('product_id').mean()

i'd have table has on columns the

product_id  count   mean

try: 

data.groupby('product_id').agg(['mean', 'count'])

Comments

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