Arusekk <[email protected]> added the comment:
Since the issue seems to have been active lately, may I suggest my view on
solving it.
One solution that comes to my mind is to keep a weak reference to the file, and
to register an atexit function per file (and to unregister it when the file is
closed). Example concept-illustrating python code for the _pyio module:
import atexit, weakref
# ...
class TextIOWrapper(TextIOBase):
def __init__(self):
# ...
self._weakclose = operator.methodcaller('close')
atexit.register(self._weakclose, weakref.proxy(self))
# ...
def close(self):
atexit.unregister(self._weakclose)
# and now actually close the file
There is a possibility of a negative impact arising from the use of
operator.methodcaller, because it may return something cached in future
versions of python. There is also the issue of unregistering an atexit function
during atexit processing. But the general idea seems to be simple and worth
considering.
----------
nosy: +Arusekk
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<https://bugs.python.org/issue17852>
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