diff options
Diffstat (limited to 'Lib/_pyio.py')
| -rw-r--r-- | Lib/_pyio.py | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/Lib/_pyio.py b/Lib/_pyio.py index f79674f..300d5b3 100644 --- a/Lib/_pyio.py +++ b/Lib/_pyio.py @@ -407,6 +407,9 @@ class IOBase(metaclass=abc.ABCMeta): if closed: return + if dealloc_warn := getattr(self, "_dealloc_warn", None): + dealloc_warn(self) + # If close() fails, the caller logs the exception with # sys.unraisablehook. close() must be called at the end at __del__(). self.close() @@ -853,6 +856,10 @@ class _BufferedIOMixin(BufferedIOBase): else: return "<{}.{} name={!r}>".format(modname, clsname, name) + def _dealloc_warn(self, source): + if dealloc_warn := getattr(self.raw, "_dealloc_warn", None): + dealloc_warn(source) + ### Lower-level APIs ### def fileno(self): @@ -1601,12 +1608,11 @@ class FileIO(RawIOBase): raise self._fd = fd - def __del__(self): + def _dealloc_warn(self, source): if self._fd >= 0 and self._closefd and not self.closed: import warnings - warnings.warn('unclosed file %r' % (self,), ResourceWarning, + warnings.warn(f'unclosed file {source!r}', ResourceWarning, stacklevel=2, source=self) - self.close() def __getstate__(self): raise TypeError(f"cannot pickle {self.__class__.__name__!r} object") @@ -1781,7 +1787,7 @@ class FileIO(RawIOBase): if not self.closed: self._stat_atopen = None try: - if self._closefd: + if self._closefd and self._fd >= 0: os.close(self._fd) finally: super().close() @@ -2690,6 +2696,10 @@ class TextIOWrapper(TextIOBase): def newlines(self): return self._decoder.newlines if self._decoder else None + def _dealloc_warn(self, source): + if dealloc_warn := getattr(self.buffer, "_dealloc_warn", None): + dealloc_warn(source) + class StringIO(TextIOWrapper): """Text I/O implementation using an in-memory buffer. |