(self)
return self._error
The error message that may have resulted from checkpointing.  This will be None if no error occurred.

        :return: the error message
        :rtype: str or None
The error message that may have resulted from checkpointing.  This will be None if no error occurred.
The error message that may have resulted from checkpointing . This will be None if no error occurred .
def error(self):
        """
        The error message that may have resulted from checkpointing.  This will be None if no error occurred.

        :return: the error message
        :rtype: str or None
        """
        return self._error
def error ( self ) : return self . _error