dataframe outer join on column code example

Example 1: pd merge on multiple columns

new_df = pd.merge(A_df, B_df,  how='left', left_on=['A_c1','c2'], right_on = ['B_c1','c2'])

Example 2: joins in pandas

pd.merge(product,customer,left_on='Product_name',right_on='Purchased_Product')