| from __future__ import annotations | |
| class UFOLibError(Exception): | |
| pass | |
| class UnsupportedUFOFormat(UFOLibError): | |
| pass | |
| class GlifLibError(UFOLibError): | |
| """An error raised by glifLib. | |
| This class is a loose backport of PEP 678, adding a :attr:`.note` | |
| attribute that can hold additional context for errors encountered. | |
| It will be maintained until only Python 3.11-and-later are supported. | |
| """ | |
| def _add_note(self, note: str) -> None: | |
| # Loose backport of PEP 678 until we only support Python 3.11+, used for | |
| # adding additional context to errors. | |
| # TODO: Replace with https://docs.python.org/3.11/library/exceptions.html#BaseException.add_note | |
| message, *rest = self.args | |
| self.args = ((message + "\n" + note), *rest) | |
| class UnsupportedGLIFFormat(GlifLibError): | |
| pass | |