replace column values in one dataframe by values of another dataframe

Question

I have two dataframes , the first one has 1000 rows and looks like:

Date            Group         Family       Bonus
2011-06-09      tri23_1       Laavin             


        

Answer 1

just use pandas join, you can refer to detail link: http://pandas.pydata.org/pandas-docs/stable/merging.html

df1.join(df2,on='Group')