def invalidate_result()

in presidio-analyzer/presidio_analyzer/predefined_recognizers/us_ssn_recognizer.py [0:0]

• 16 lines of code
• 13 McCabe index (conditional complexity)

    def invalidate_result(self, pattern_text: str) -> bool:
        """
        Check if the pattern text cannot be validated as a US_SSN entity.

        :param pattern_text: Text detected as pattern by regex
        :return: True if invalidated
        """
        # if there are delimiters, make sure both delimiters are the same
        delimiter_counts = defaultdict(int)
        for c in pattern_text:
            if c in (".", "-", " "):
                delimiter_counts[c] += 1
        if len(delimiter_counts.keys()) > 1:
            # mismatched delimiters
            return True

        only_digits = "".join(c for c in pattern_text if c.isdigit())
        if all(only_digits[0] == c for c in only_digits):
            # cannot be all same digit
            return True

        if only_digits[3:5] == "00" or only_digits[5:] == "0000":
            # groups cannot be all zeros
            return True

        for sample_ssn in ("000", "666", "123456789", "98765432", "078051120"):
            if only_digits.startswith(sample_ssn):
                return True

        return False