Function warn_once

src/transformers/testing_utils.py:4318–4330

Log a warning message only once per unique message. Uses a global set to track messages that have already been logged to prevent duplicate warning messages from cluttering the output. Args: logger_instance: The logger instance to use for warning. msg: The warning messag

(logger_instance: logging.Logger, msg: str)

def warn_once(logger_instance: logging.Logger, msg: str) -> None:
    """Log a warning message only once per unique message.

    Uses a global set to track messages that have already been logged
    to prevent duplicate warning messages from cluttering the output.

    Args:
        logger_instance: The logger instance to use for warning.
        msg: The warning message to log.
    """
    if msg not in _warn_once_logged:
        logger_instance.warning(msg)
        _warn_once_logged.add(msg)


# Named tuple for passing memory stats for logging