pandas get all columns that added a suffix code example
Example: suffixes in pandas
df1.merge(df2, on='col_1').merge(df_3, on='col_2', suffixes=('_suff1', '_suff2'))
df1.merge(df2, on='col_1').merge(df_3, on='col_2', suffixes=('_suff1', '_suff2'))