Answers for "pandas merge on different column names"

merge two dataframes based on column

df_outer = pd.merge(df1, df2, on='id', how='outer') #here id is common column

df_outer

merge two columns name in one header pandas

df['A'] = df[a_cols].apply(' '.join, axis=1)

how to merge two column pandas

DataFrame["new_column"] = DataFrame["column1"] + DataFrame["column2"]