(self, attr, value)
| 880 | self._update(vars, mode) |
| 881 | |
| 882 | def ensure_value(self, attr, value): |
| 883 | if not hasattr(self, attr) or getattr(self, attr) is None: |
| 884 | setattr(self, attr, value) |
| 885 | return getattr(self, attr) |
| 886 | |
| 887 | |
| 888 | class OptionContainer: |