diff options
Diffstat (limited to 'Doc/whatsnew/3.12.rst')
| -rw-r--r-- | Doc/whatsnew/3.12.rst | 94 |
1 files changed, 47 insertions, 47 deletions
diff --git a/Doc/whatsnew/3.12.rst b/Doc/whatsnew/3.12.rst index cf0a3f2..76f1f00 100644 --- a/Doc/whatsnew/3.12.rst +++ b/Doc/whatsnew/3.12.rst @@ -465,45 +465,9 @@ and others in :gh:`103764`.) Other Language Changes ====================== -* Add :ref:`support for the perf profiler <perf_profiling>` through the new - environment variable :envvar:`PYTHONPERFSUPPORT` - and command-line option :option:`-X perf <-X>`, - as well as the new :func:`sys.activate_stack_trampoline`, - :func:`sys.deactivate_stack_trampoline`, - and :func:`sys.is_stack_trampoline_active` functions. - (Design by Pablo Galindo. Contributed by Pablo Galindo and Christian Heimes - with contributions from Gregory P. Smith [Google] and Mark Shannon - in :gh:`96123`.) - -* The extraction methods in :mod:`tarfile`, and :func:`shutil.unpack_archive`, - have a new a *filter* argument that allows limiting tar features than may be - surprising or dangerous, such as creating files outside the destination - directory. - See :ref:`tarfile extraction filters <tarfile-extraction-filter>` for details. - In Python 3.14, the default will switch to ``'data'``. - (Contributed by Petr Viktorin in :pep:`706`.) - -* :class:`types.MappingProxyType` instances are now hashable if the underlying - mapping is hashable. - (Contributed by Serhiy Storchaka in :gh:`87995`.) - -* :class:`memoryview` now supports the half-float type (the "e" format code). - (Contributed by Donghee Na and Antoine Pitrou in :gh:`90751`.) - * The parser now raises :exc:`SyntaxError` when parsing source code containing null bytes. (Contributed by Pablo Galindo in :gh:`96670`.) -* :func:`ast.parse` now raises :exc:`SyntaxError` instead of :exc:`ValueError` - when parsing source code containing null bytes. (Contributed by Pablo Galindo - in :gh:`96670`.) - -* The Garbage Collector now runs only on the eval breaker mechanism of the - Python bytecode evaluation loop instead of object allocations. The GC can - also run when :c:func:`PyErr_CheckSignals` is called so C extensions that - need to run for a long time without executing any Python code also have a - chance to execute the GC periodically. (Contributed by Pablo Galindo in - :gh:`97922`.) - * A backslash-character pair that is not a valid escape sequence now generates a :exc:`SyntaxWarning`, instead of :exc:`DeprecationWarning`. For example, ``re.compile("\d+\.\d+")`` now emits a :exc:`SyntaxWarning` @@ -519,10 +483,6 @@ Other Language Changes In a future Python version they will be eventually a :exc:`SyntaxError`. (Contributed by Victor Stinner in :gh:`98401`.) -* All builtin and extension callables expecting boolean parameters now accept - arguments of any type instead of just :class:`bool` and :class:`int`. - (Contributed by Serhiy Storchaka in :gh:`60203`.) - * Variables used in the target part of comprehensions that are not stored to can now be used in assignment expressions (``:=``). For example, in ``[(b := 1) for a, b.prop in some_iter]``, the assignment to @@ -530,13 +490,6 @@ Other Language Changes part of comprehensions (like ``a``) is still disallowed, as per :pep:`572`. (Contributed by Nikita Sobolev in :gh:`100581`.) -* :class:`slice` objects are now hashable, allowing them to be used as dict keys and - set items. (Contributed by Will Bradshaw, Furkan Onder, and Raymond Hettinger in :gh:`101264`.) - -* :func:`sum` now uses Neumaier summation to improve accuracy and commutativity - when summing floats or mixed ints and floats. - (Contributed by Raymond Hettinger in :gh:`100425`.) - * Exceptions raised in a class or type's ``__set_name__`` method are no longer wrapped by a :exc:`RuntimeError`. Context information is added to the exception as a :pep:`678` note. (Contributed by Irit Katriel in :gh:`77757`.) @@ -546,6 +499,53 @@ Other Language Changes :exc:`ExceptionGroup`. Also changed in version 3.11.4. (Contributed by Irit Katriel in :gh:`103590`.) +* The Garbage Collector now runs only on the eval breaker mechanism of the + Python bytecode evaluation loop instead of object allocations. The GC can + also run when :c:func:`PyErr_CheckSignals` is called so C extensions that + need to run for a long time without executing any Python code also have a + chance to execute the GC periodically. (Contributed by Pablo Galindo in + :gh:`97922`.) + +* All builtin and extension callables expecting boolean parameters now accept + arguments of any type instead of just :class:`bool` and :class:`int`. + (Contributed by Serhiy Storchaka in :gh:`60203`.) + +* :class:`memoryview` now supports the half-float type (the "e" format code). + (Contributed by Donghee Na and Antoine Pitrou in :gh:`90751`.) + +* :class:`slice` objects are now hashable, allowing them to be used as dict keys and + set items. (Contributed by Will Bradshaw, Furkan Onder, and Raymond Hettinger in :gh:`101264`.) + +* :func:`sum` now uses Neumaier summation to improve accuracy and commutativity + when summing floats or mixed ints and floats. + (Contributed by Raymond Hettinger in :gh:`100425`.) + +* :func:`ast.parse` now raises :exc:`SyntaxError` instead of :exc:`ValueError` + when parsing source code containing null bytes. (Contributed by Pablo Galindo + in :gh:`96670`.) + +* The extraction methods in :mod:`tarfile`, and :func:`shutil.unpack_archive`, + have a new a *filter* argument that allows limiting tar features than may be + surprising or dangerous, such as creating files outside the destination + directory. + See :ref:`tarfile extraction filters <tarfile-extraction-filter>` for details. + In Python 3.14, the default will switch to ``'data'``. + (Contributed by Petr Viktorin in :pep:`706`.) + +* :class:`types.MappingProxyType` instances are now hashable if the underlying + mapping is hashable. + (Contributed by Serhiy Storchaka in :gh:`87995`.) + +* Add :ref:`support for the perf profiler <perf_profiling>` through the new + environment variable :envvar:`PYTHONPERFSUPPORT` + and command-line option :option:`-X perf <-X>`, + as well as the new :func:`sys.activate_stack_trampoline`, + :func:`sys.deactivate_stack_trampoline`, + and :func:`sys.is_stack_trampoline_active` functions. + (Design by Pablo Galindo. Contributed by Pablo Galindo and Christian Heimes + with contributions from Gregory P. Smith [Google] and Mark Shannon + in :gh:`96123`.) + New Modules =========== |