def _operation_status(self):
if not self._op['<STR_LIT>']:<EOL><INDENT>return '<STR_LIT>'<EOL><DEDENT>if '<STR_LIT:error>' not in self._op:<EOL><INDENT>return '<STR_LIT>'<EOL><DEDENT>if self._op['<STR_LIT:error>'].get('<STR_LIT:code>', <NUM_LIT:0>) == <NUM_LIT:1>:<EOL><INDENT>return '<STR_LIT>'<EOL><DEDENT>return '<STR_LIT>'<EOL>
Returns the status of this operation.

        ie. RUNNING, SUCCESS, CANCELED or FAILURE.

        Returns:
          A printable status string