Tim Peters <t...@python.org> added the comment:
Not a problem. Arguments to a function are evaluated before the function is
invoked. So in
self._finalizer = weakref.finalize(self, shutil.rmtree, self.name)
self.name is evaluated before weakref.finalize is called(). `self.name`
_extracts_ the `.name` attribute of `self`, and the result is simply a pathname
(returned by the earlier call to `mkdtemp()`), from which `self` cannot be
accessed.
Just like, e.g., for just about any old object O, after
O.name = 42
a later `O.name` extracts the int 42, with no trace of that 42 had anything to
do with `O`.
This isn't so when for a bound method object: `O.method_name` constructs and
returns an object that _does_ reference `O`. That's why the earlier docs
highlight bound method objects. For an attribute `name` bound to a chunk of
data, `O.name` just retrieves that data, which _generally_ has nothing to do
with `O` beyond that it happens to be reachable from `O` (but also generally
NOT the reverse).
----------
nosy: +tim.peters
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue42945>
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