Trying to join 2 Dataframes, and store certain data as an array in one cell

Question

I have the following 3 data frames:

Frist dataframe:

DF1: 

iID data1 data2

10  blue  green

11  red   teal

Second dataframe:

Answer 1

IIUC

df1.merge(df2.groupby('iID').agg(lambda x : x.tolist()).reset_index())
Out[144]: 
   iID data1  data2        rH      repH
0   10  blue  green  [50, 60]  [60, 70]
1   11   red   teal      [70]      [50]