join multiple dataframes using one 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: how to join two dataframe in pandas based on two column
merged_df = left_df.merge(right_df, how='inner', left_on=["A", "B"], right_on=["A2","B2"])