How to use the datacompy.sparkcompare.MatchType.KNOWN_DIFFERENCE function in datacompy

+ ") = A.{name})"
                        )

        case_string = (
            "( CASE WHEN ("
            + " OR ".join(equal_comparisons)
            + ") THEN {match_success} WHEN ("
            + " OR ".join(known_diff_comparisons)
            + ") THEN {match_known_difference} ELSE {match_failure} END) "
            + "AS {name}, A.{name} AS {name}_base, B.{name} AS {name}_compare"
        )

        return case_string.format(
            name=name,
            match_success=MatchType.MATCH.value,
            match_known_difference=MatchType.KNOWN_DIFFERENCE.value,
            match_failure=MatchType.MISMATCH.value,
        )