PIIDetectionError Class — langchain Architecture

Source Code

libs/langchain_v1/langchain/agents/middleware/_redaction.py lines 29–43

class PIIDetectionError(Exception):
    """Raised when configured to block on detected sensitive values."""

    def __init__(self, pii_type: str, matches: Sequence[PIIMatch]) -> None:
        """Initialize the exception with match context.

        Args:
            pii_type: Name of the detected sensitive type.
            matches: All matches that were detected for that type.
        """
        self.pii_type = pii_type
        self.matches = list(matches)
        count = len(matches)
        msg = f"Detected {count} instance(s) of {pii_type} in text content"
        super().__init__(msg)