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whatsnew: ssl getpeercert/do_handshake raise OSError, weakref __callback__.
Also add a missing word to gc entry, and delete a now-obsolete doc note in the weakref __callback__ docs. (Opened an issue for rewriting the section that compares finalizers and __del__ method.)
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@ -123,15 +123,6 @@ Extension types can easily be made to support weak references; see
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weakref. If there is no callback or if the referent of the weakref is
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no longer alive then this attribute will have value ``None``.
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.. note::
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Like :meth:`__del__` methods, weak reference callbacks can be
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called during interpreter shutdown when module globals have been
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overwritten with :const:`None`. This can make writing robust
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weak reference callbacks a challenge. Callbacks registered
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using :class:`finalize` do not have to worry about this issue
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because they will not be run after module teardown has begun.
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.. versionchanged:: 3.4
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Added the :attr:`__callback__` attribute.
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@ -247,7 +238,7 @@ These method have the same issues as the and :meth:`keyrefs` method of
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.. class:: finalize(obj, func, *args, **kwargs)
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Return a callable finalizer object which will be called when *obj*
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is garbage collected. Unlike an ordinary weak reference, a finalizer is
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is garbage collected. Unlike an ordinary weak reference, a finalizer
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will always survive until the reference object is collected, greatly
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simplifying lifecycle management.
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@ -657,9 +657,9 @@ available for other implementations to use. (Contributed by Brian Thorne in
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gc
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--
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New :func:`~gc.get_stats` returns a list of three per-generation dictionaries
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containing the collections statistics since interpreter startup. (Contributed
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by Antoine Pitrou in :issue:`16351`.)
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New function :func:`~gc.get_stats` returns a list of three per-generation
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dictionaries containing the collections statistics since interpreter startup.
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(Contributed by Antoine Pitrou in :issue:`16351`.)
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hashlib
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@ -1103,6 +1103,10 @@ to be invoked when an object is garbage collected, without needing to
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carefully manage the lifecycle of the weak reference itself. (Contributed by
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Richard Oudkerk in :issue:`15528`)
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The callback, if any, associated with a :class:`~weakref.ref` is now
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exposed via the :attr:`~weakref.ref.__callback__` attribute. (Contributed
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by Mark Dickinson in :issue:`17643`.)
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xml.etree
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---------
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@ -1482,6 +1486,12 @@ Changes in the Python API
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compliance with the language spec; Jython and PyPy already were.
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(:issue:`17434`).
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* :meth:`ssl.SSLSocket.getpeercert` and :meth:`ssl.SSLSocket.do_handshake`
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now raise an :exc:`OSError` with ``ENOTCONN`` when the ``SSLSocket`` is not
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connected, instead of the previous behavior of raising an
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:exc:`AttributError`. In addition, :meth:`~ssl.SSLSocket.getpeercert`
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will raise a :exc:`ValueError` if the handshake has not yet been done.
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Changes in the C API
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--------------------
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