Ensure the file has been opened and its header data read.
(self)
| 1072 | self._native_byteorder = _set_endianness(sys.byteorder) |
| 1073 | |
| 1074 | def _ensure_open(self) -> None: |
| 1075 | """ |
| 1076 | Ensure the file has been opened and its header data read. |
| 1077 | """ |
| 1078 | if not hasattr(self, "_path_or_buf"): |
| 1079 | self._open_file() |
| 1080 | |
| 1081 | def _open_file(self) -> None: |
| 1082 | """ |