def __init__(self, originalException):
        """
        Create an UnlistableError exception.

        @param originalException: an instance of OSError.
        """
        self.__dict__.update(originalException.__dict__)
        self.originalException = originalException

        Create an UnlistableError exception.

        @param originalException: an instance of OSError.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/python/filepath.py