Mergining excel sheet in pandas

Question

Having an two excel sheet as follows:

Need to merge these two excel sheet using pandas.Second sheet needs to be merge with the first excel. The output will be want in the following format.

Answer 1

Let's assume you have df1 and df2 and you wanna merge the two dataframes together on the same start here is sample:

df = df1.merge(df2, how='outer', on='Start')