.. bpo: 42988
.. date: 2021-03-24-14-16-56
.. nonce: P2aNco
.. release date: 2021-04-05
.. section: Security
:cve:`2021-3426`: Remove the ``getfile`` feature of the :mod:`pydoc` module
which could be abused to read arbitrary files on the disk (directory
traversal vulnerability). Moreover, even source code of Python modules can
contain sensitive data like passwords. Vulnerability reported by David
Schwörer.
..
.. bpo: 43285
.. date: 2021-03-13-03-48-14
.. nonce: g-Hah3
.. section: Security
:mod:`ftplib` no longer trusts the IP address value returned from the server
in response to the PASV command by default. This prevents a malicious FTP
server from using the response to probe IPv4 address and port combinations
on the client network.
Code that requires the former vulnerable behavior may set a
``trust_server_pasv_ipv4_address`` attribute on their :class:`ftplib.FTP`
instances to ``True`` to re-enable it.
..
.. bpo: 43439
.. date: 2021-03-08-23-06-07
.. nonce: 5U3lXm
.. section: Security
Add audit hooks for :func:`gc.get_objects`, :func:`gc.get_referrers` and
:func:`gc.get_referents`. Patch by Pablo Galindo.
..
.. bpo: 27129
.. date: 2021-04-03-22-04-46
.. nonce: u_ehHb
.. section: Core and Builtins
Update CPython bytecode magic number.
..
.. bpo: 43672
.. date: 2021-03-31-09-12-54
.. nonce: jTT5uG
.. section: Core and Builtins
Raise ImportWarning when calling find_loader().
..
.. bpo: 43660
.. date: 2021-03-29-19-50-34
.. nonce: scTgag
.. section: Core and Builtins
Fix crash that happens when replacing ``sys.stderr`` with a callable that
can remove the object while an exception is being printed. Patch by Pablo
Galindo.
..
.. bpo: 27129
.. date: 2021-03-29-16-20-29
.. nonce: BF03A5
.. section: Core and Builtins
The bytecode interpreter uses instruction, rather byte, offsets internally.
This reduces the number of EXTENDED_ARG instructions needed and streamlines
instruction dispatch a bit.
..
.. bpo: 40645
.. date: 2021-03-29-11-55-06
.. nonce: PhaT-B
.. section: Core and Builtins
Fix reference leak in the :mod:`!_hashopenssl` extension. Patch by Pablo
Galindo.
..
.. bpo: 42134
.. date: 2021-03-26-17-30-19
.. nonce: G4Sjxg
.. section: Core and Builtins
Calls to find_module() by the import system now raise ImportWarning.
..
.. bpo: 41064
.. date: 2021-03-24-00-32-20
.. nonce: _H0K_g
.. section: Core and Builtins
Improve the syntax error for invalid usage of double starred elements ('**')
in f-strings. Patch by Pablo Galindo.
..
.. bpo: 43575
.. date: 2021-03-21-12-26-32
.. nonce: pl-nSg
.. section: Core and Builtins
Speed up calls to ``map()`` by using the :pep:`590` ``vectorcall`` calling
convention. Patch by Donghee Na.
..
.. bpo: 42137
.. date: 2021-03-20-19-54-47
.. nonce: A8aQvj
.. section: Core and Builtins
The import system now prefers using ``__spec__`` for ``ModuleType.__repr__``
over ``module_repr()``.
..
.. bpo: 43452
.. date: 2021-03-20-01-21-37
.. nonce: tDVJkc
.. section: Core and Builtins
Added micro-optimizations to ``_PyType_Lookup()`` to improve cache lookup
performance in the common case of cache hits.
..
.. bpo: 43555
.. date: 2021-03-19-22-49-40
.. nonce: ZmhYSA
.. section: Core and Builtins
Report the column offset for :exc:`SyntaxError` for invalid line
continuation characters. Patch by Pablo Galindo.
..
.. bpo: 43517
.. date: 2021-03-16-17-12-54
.. nonce: zAo6Ws
.. section: Core and Builtins
Fix misdetection of circular imports when using ``from pkg.mod import
attr``, which caused false positives in non-trivial multi-threaded code.
..
.. bpo: 43497
.. date: 2021-03-15-07-50-30
.. nonce: Uc5ZCJ
.. section: Core and Builtins
Emit SyntaxWarnings for assertions with tuple constants, this is a
regression introduced in python3.7
..
.. bpo: 39316
.. date: 2021-03-14-16-44-50
.. nonce: Ns3a_F
.. section: Core and Builtins
Tracing now has correct line numbers for attribute accesses when the
attribute is on a different line from the object. Improves debugging and
profiling for multi-line method chains.
..
.. bpo: 35883
.. date: 2021-03-13-13-57-21
.. nonce: UyGpdG
.. section: Core and Builtins
Python no longer fails at startup with a fatal error if a command line
argument contains an invalid Unicode character. The
:c:func:`Py_DecodeLocale` function now escapes byte sequences which would be
decoded as Unicode characters outside the [U+0000; U+10ffff] range.
..
.. bpo: 43410
.. date: 2021-03-05-17-23-36
.. nonce: lCzIg0
.. section: Core and Builtins
Fix a bug that was causing the parser to crash when emitting syntax errors
when reading input from stdin. Patch by Pablo Galindo
..
.. bpo: 43406
.. date: 2021-03-04-22-53-10
.. nonce: Na_VpA
.. section: Core and Builtins
Fix a possible race condition where ``PyErr_CheckSignals`` tries to execute
a non-Python signal handler.
..
.. bpo: 42128
.. date: 2021-03-03-19-04-23
.. nonce: VouZjn
.. section: Core and Builtins
Add ``__match_args__`` to :ref:`struct sequence objects <struct-sequence-objects>`.
Patch by Pablo Galindo.
..
.. bpo: 43390
.. date: 2021-03-03-17-58-49
.. nonce: epPpwV
.. section: Core and Builtins
CPython now sets the ``SA_ONSTACK`` flag in ``PyOS_setsig`` for the VM's
default signal handlers. This is friendlier to other in-process code that
an extension module or embedding use could pull in (such as Golang's cgo)
where tiny thread stacks are the norm and ``sigaltstack()`` has been used to
provide for signal handlers. This is a no-op change for the vast majority
of processes that don't use sigaltstack.
..
.. bpo: 43287
.. date: 2021-02-22-03-01-02
.. nonce: aTs6fO
.. section: Core and Builtins
Speed up calls to ``filter()`` by using the :pep:`590` ``vectorcall``
calling convention. Patch by Donghee Na.
..
.. bpo: 37448
.. date: 2021-02-21-14-19-35
.. nonce: btl7vO
.. section: Core and Builtins
Add a radix tree based memory map to track in-use obmalloc arenas. Use to
replace the old implementation of address_in_range(). The radix tree
approach makes it easy to increase pool sizes beyond the OS page size.
Boosting the pool and arena size allows obmalloc to handle a significantly
higher percentage of requests from its ultra-fast paths.
It also has the advantage of eliminating the memory unsanitary behavior of
the previous address_in_range(). The old address_in_range() was marked with
the annotations _Py_NO_SANITIZE_ADDRESS, _Py_NO_SANITIZE_THREAD, and
_Py_NO_SANITIZE_MEMORY. Those annotations are no longer needed.
To disable the radix tree map, set a preprocessor flag as follows:
``-DWITH_PYMALLOC_RADIX_TREE=0``.
Co-authored-by: Tim Peters <[email protected]>
..
.. bpo: 29988
.. date: 2020-02-03-13-23-10
.. nonce: 8_UB5w
.. section: Core and Builtins
Only handle asynchronous exceptions and requests to drop the GIL when
returning from a call or on the back edges of loops. Makes sure that
:meth:`~object.__exit__` is always called in with statements, even for interrupts.
..
.. bpo: 43720
.. date: 2021-04-03-13-45-51
.. nonce: FDZ5cZ
.. section: Library
Document various stdlib deprecations in imp, pkgutil, and importlib.util for
removal in Python 3.12.
..
.. bpo: 43433
.. date: 2021-03-28-23-50-20
.. nonce: so9j5G
.. section: Library
:class:`xmlrpc.client.ServerProxy` no longer ignores query and fragment in
the URL of the server.
..
.. bpo: 31956
.. date: 2021-03-28-16-53-25
.. nonce: Lt_67U
.. section: Library
The :meth:`~array.array.index` method of :class:`array.array` now has
optional *start* and *stop* parameters.
..
.. bpo: 40066
.. date: 2021-03-25-21-26-30
.. nonce: 7EBQ3_
.. section: Library
Enum: adjust ``repr()`` to show only enum and member name (not value, nor
angle brackets) and ``str()`` to show only member name. Update and improve
documentation to match.
..
.. bpo: 42136
.. date: 2021-03-25-08-44-26
.. nonce: rRY9e1
.. section: Library
Deprecate all module_repr() methods found in importlib as their use is being
phased out by Python 3.12.
..
.. bpo: 35930
.. date: 2021-03-23-17-18-56
.. nonce: RZ51pM
.. section: Library
Raising an exception raised in a "future" instance will create reference
cycles.
..
.. bpo: 41369
.. date: 2021-03-21-17-50-42
.. nonce: -fpmYZ
.. section: Library
Finish updating the vendored libmpdec to version 2.5.1. Patch by Stefan
Krah.
..
.. bpo: 43422
.. date: 2021-03-21-17-02-52
.. nonce: POk6cU
.. section: Library
Revert the _decimal C API which was added in bpo-41324.
..
.. bpo: 43577
.. date: 2021-03-21-10-13-17
.. nonce: m7JnAV
.. section: Library
Fix deadlock when using :class:`ssl.SSLContext` debug callback with
:meth:`ssl.SSLContext.sni_callback`.
..
.. bpo: 43571
.. date: 2021-03-20-17-40-35
.. nonce: acAL0W
.. section: Library
It's now possible to create MPTCP sockets with IPPROTO_MPTCP
..
.. bpo: 43542
.. date: 2021-03-20-15-43-25
.. nonce: 6bt2F6
.. section: Library
``image/heic`` and ``image/heif`` were added to :mod:`mimetypes`.
..
.. bpo: 40645
.. date: 2021-03-19-10-22-17
.. nonce: 5pXhb-
.. section: Library
The :mod:`hmac` module now uses OpenSSL's HMAC implementation when digestmod
argument is a hash name or builtin hash function.
..
.. bpo: 43510
.. date: 2021-03-16-17-20-33
.. nonce: -BeQH_
.. section: Library
Implement :pep:`597`: Add ``EncodingWarning`` warning, ``-X
warn_default_encoding`` option, :envvar:`PYTHONWARNDEFAULTENCODING`
environment variable and ``encoding="locale"`` argument value.
..
.. bpo: 43521
.. date: 2021-03-16-16-05-02
.. nonce: mRT6fh
.. section: Library
``ast.unparse`` can now render NaNs and empty sets.
..
.. bpo: 42914
.. date: 2021-03-14-21-47-28
.. nonce: 9U1o33
.. section: Library
:func:`pprint.pprint` gains a new boolean ``underscore_numbers`` optional
argument to emit integers with thousands separated by an underscore
character for improved readability (for example ``1_000_000`` instead of
``1000000``).
..
.. bpo: 41361
.. date: 2021-03-13-08-18-01
.. nonce: lXDIlr
.. section: Library
:meth:`~collections.deque.rotate` calls are now slightly faster due to
faster argument parsing.
..
.. bpo: 43423
.. date: 2021-03-11-15-44-18
.. nonce: rRomRD
.. section: Library
:func:`subprocess.communicate` no longer raises an IndexError when there is
an empty stdout or stderr IO buffer during a timeout on Windows.
..
.. bpo: 27820
.. date: 2021-03-10-14-07-44
.. nonce: Wwdy-r
.. section: Library
Fixed long-standing bug of smtplib.SMTP where doing AUTH LOGIN with
initial_response_ok=False will fail.
The cause is that SMTP.auth_login _always_ returns a password if provided
with a challenge string, thus non-compliant with the standard for AUTH
LOGIN.
Also fixes bug with the test for smtpd.
..
.. bpo: 43445
.. date: 2021-03-09-11-36-19
.. nonce: jnj-UB
.. section: Library
Add frozen modules to :data:`sys.stdlib_module_names`. For example, add
``"_frozen_importlib"`` and ``"_frozen_importlib_external"`` names.
..
.. bpo: 43245
.. date: 2021-03-08-22-14-37
.. nonce: nXL-MC
.. section: Library
Add keyword arguments support to ``ChainMap.new_child()``.
..
.. bpo: 29982
.. date: 2021-03-07-23-23-03
.. nonce: Q9iszT
.. section: Library
Add optional parameter *ignore_cleanup_errors* to
:func:`tempfile.TemporaryDirectory` and allow multiple :func:`cleanup`
attempts. Contributed by C.A.M. Gerlach.
..
.. bpo: 43428
.. date: 2021-03-07-18-54-39
.. nonce: br0XmX
.. section: Library
Include changes from `importlib_metadata 3.7
<https://importlib-metadata.readthedocs.io/en/latest/history.html#v3-7-0>`_:
Performance enhancements to distribution discovery.
``entry_points`` only returns unique distributions.
Introduces new ``EntryPoints`` object for containing a set of entry points
with convenience methods for selecting entry points by group or name.
``entry_points`` now returns this object if selection parameters are
supplied but continues to return a dict object for compatibility. Users are
encouraged to rely on the selection interface. The dict object result is
likely to be deprecated in the future.
Added packages_distributions function to return a mapping of packages to the
distributions that provide them.
..
.. bpo: 43332
.. date: 2021-03-07-11-23-20
.. nonce: weatsh
.. section: Library
Improves the networking efficiency of :mod:`http.client` when using a proxy
via :meth:`~HTTPConnection.set_tunnel`. Fewer small send calls are made
during connection setup.
..
.. bpo: 43420
.. date: 2021-03-07-08-03-31
.. nonce: cee_X5
.. section: Library
Improve performance of :class:`fractions.Fraction` arithmetics for large
components. Contributed by Sergey B. Kirpichev.
..
.. bpo: 43356
.. date: 2021-03-04-21-51-20
.. nonce: X7IGBM
.. section: Library
Allow passing a signal number to ``_thread.interrupt_main()``.
..
.. bpo: 43399
.. date: 2021-03-04-17-53-46
.. nonce: Wn95u-
.. section: Library
Fix ``ElementTree.extend`` not working on iterators when using the Python
implementation
..
.. bpo: 43369
.. date: 2021-03-02-15-25-28
.. nonce: F4knlQ
.. section: Library
Improve :mod:`sqlite3` error handling: If ``sqlite3_column_text()`` and
``sqlite3_column_blob()`` set ``SQLITE_NOMEM``, :exc:`MemoryError` is now
raised. Patch by Erlend E. Aasland.
..
.. bpo: 43368
.. date: 2021-03-02-13-45-05
.. nonce: t9XEkQ
.. section: Library
Fix a regression introduced in PR 24562, where an empty bytestring was
fetched as ``None`` instead of ``b''`` in :mod:`sqlite3`. Patch by Mariusz
Felisiak.
..
.. bpo: 41282
.. date: 2021-03-02-09-54-22
.. nonce: xL4h94
.. section: Library
Fixed stacklevel of ``DeprecationWarning`` emitted from ``import
distutils``.
..
.. bpo: 42129
.. date: 2021-02-28-04-21-35
.. nonce: V0KifQ
.. section: Library
``importlib.resources`` now honors namespace packages, merging resources
from each location in the namespace as introduced in ``importlib_resources``
3.2 and including incidental changes through 5.0.3.
..
.. bpo: 43295
.. date: 2021-02-22-22-54-40
.. nonce: h_ffu7
.. section: Library
:meth:`datetime.datetime.strptime` now raises ``ValueError`` instead of
``IndexError`` when matching ``'z'`` with the ``%z`` format specifier.
..
.. bpo: 43125
.. date: 2021-02-07-19-13-30
.. nonce: AqNoMa
.. section: Library
Return empty string if base64mime.body_encode receive empty bytes
..
.. bpo: 43084
.. date: 2021-01-31-17-31-13
.. nonce: i8nLpK
.. section: Library
:func:`curses.window.enclose` returns now ``True`` or ``False`` (as was
documented) instead of ``1`` or ``0``.
..
.. bpo: 42994
.. date: 2021-01-21-16-58-34
.. nonce: El0Ksp
.. section: Library
Add MIME types for opus, AAC, 3gpp and 3gpp2
..
.. bpo: 14678
.. date: 2021-01-07-21-25-49
.. nonce: 1zniCH
.. section: Library
Add an invalidate_caches() method to the zipimport.zipimporter class to
support importlib.invalidate_caches(). Patch by Desmond Cheong.
..
.. bpo: 42782
.. date: 2020-12-29-13-46-57
.. nonce: 3r0HFY
.. section: Library
Fail fast in :func:`shutil.move` to avoid creating destination directories
on failure.
..
.. bpo: 40066
.. date: 2020-09-23-21-58-34
.. nonce: f1dr_5
.. section: Library
Enum's ``repr()`` and ``str()`` have changed: ``repr()`` is now
*EnumClass.MemberName* and ``str()`` is *MemberName*. Additionally, stdlib
Enum's whose contents are available as module attributes, such as
``RegexFlag.IGNORECASE``, have their ``repr()`` as *module.name*, e.g.
``re.IGNORECASE``.
..
.. bpo: 26053
.. date: 2020-09-01-10-12-13
.. nonce: hXikw_
.. section: Library
Fixed bug where the :mod:`pdb` interactive run command echoed the args from
the shell command line, even if those have been overridden at the pdb
prompt.
..
.. bpo: 24160
.. date: 2020-08-28-23-07-53
.. nonce: MSGnKr
.. section: Library
Fixed bug where breakpoints did not persist across multiple debugger
sessions in :mod:`pdb`'s interactive mode.
..
.. bpo: 40701
.. date: 2020-05-27-05-42-39
.. nonce: PBIgW1
.. section: Library
When the :data:`tempfile.tempdir` global variable is set to a value of type
bytes, it is now handled consistently. Previously exceptions could be
raised from some tempfile APIs when the directory did not already exist in
this situation. Also ensures that the :func:`tempfile.gettempdir` and
:func:`tempfile.gettempdirb` functions *always* return ``str`` and
``bytes`` respectively.
..
.. bpo: 39342
.. date: 2020-01-15-11-15-35
.. nonce: S8PuJO
.. section: Library
Expose ``X509_V_FLAG_ALLOW_PROXY_CERTS`` as
:const:`~ssl.VERIFY_ALLOW_PROXY_CERTS` to allow proxy certificate validation
as explained in
https://docs.openssl.org/1.1.1/man7/proxy-certificates/.
..
.. bpo: 31861
.. date: 2018-08-24-01-08-09
.. nonce: -q9RKJ
.. section: Library
Add builtins.aiter and builtins.anext. Patch by Joshua Bronson (@jab),
Daniel Pope (@lordmauve), and Justin Wang (@justin39).
..
.. bpo: 43199
.. date: 2021-03-13-18-43-54
.. nonce: ZWA6KX
.. section: Documentation
Answer "Why is there no goto?" in the Design and History FAQ.
..
.. bpo: 43407
.. date: 2021-03-04-22-53-03
.. nonce: x570l5
.. section: Documentation
Clarified that a result from :func:`time.monotonic`,
:func:`time.perf_counter`, :func:`time.process_time`, or
:func:`time.thread_time` can be compared with the result from any following
call to the same function - not just the next immediate call.
..
.. bpo: 43354
.. date: 2021-03-02-12-55-34
.. nonce: ezZYkx
.. section: Documentation
Fix type documentation for ``Fault.faultCode``; the type has to be ``int``
instead of ``str``.
..
.. bpo: 41933
.. date: 2020-10-05-20-04-43
.. nonce: Pff94-
.. section: Documentation
Clarified wording of s * n in the Common Sequence Operations
..
.. bpo: 37945
.. date: 2021-03-31-11-38-42
.. nonce: HTUYhv
.. section: Tests
Fix test_getsetlocale_issue1813() of test_locale: skip the test if
``setlocale()`` fails. Patch by Victor Stinner.
..
.. bpo: 41561
.. date: 2021-03-18-10-34-42
.. nonce: pDg4w-
.. section: Tests
Add workaround for Ubuntu's custom OpenSSL security level policy.
..
.. bpo: 43179
.. date: 2021-03-31-12-20-23
.. nonce: Qbe1OD
.. section: Build
Introduce and correctly use ALIGNOF_X in place of SIZEOF_X for
alignment-related code in optimized string routines. Patch by Jessica
Clarke.
..
.. bpo: 43631
.. date: 2021-03-26-09-16-34
.. nonce: msJyPi
.. section: Build
Update macOS, Windows, and CI to OpenSSL 1.1.1k.
..
.. bpo: 43617
.. date: 2021-03-24-16-55-55
.. nonce: d69KAv
.. section: Build
Improve configure.ac: Check for presence of autoconf-archive package and
remove our copies of M4 macros.
..
.. bpo: 43466
.. date: 2021-03-11-00-14-47
.. nonce: N861Z5
.. section: Build
The ``configure`` script now supports ``--with-openssl-rpath`` option.
..
.. bpo: 43372
.. date: 2021-03-04-17-13-57
.. nonce: FfqDVL
.. section: Build
Use ``_freeze_importlib`` to generate code for the ``__hello__`` module.
This approach ensures the code matches the interpreter version. Previously,
PYTHON_FOR_REGEN was used to generate the code, which might be wrong. The
marshal format for code objects has changed with bpo-42246, commit 877df851.
Update the code and the expected code sizes in ctypes test_frozentable.
..
.. bpo: 43440
.. date: 2021-03-09-11-15-41
.. nonce: igy2Mn
.. section: Windows
Build :mod:`sqlite3` with the ``R*Tree`` module enabled. Patch by Erlend E.
Aasland.
..
.. bpo: 42225
.. date: 2021-03-29-16-22-27
.. nonce: iIeiLg
.. section: IDLE
Document that IDLE can fail on Unix either from misconfigured IP masquerade
rules or failure displaying complex colored (non-ascii) characters.
..
.. bpo: 43688
.. date: 2021-04-01-09-10-42
.. nonce: G4gs6k
.. section: C API
The limited C API is now supported if Python is built in debug mode (if the
``Py_DEBUG`` macro is defined). In the limited C API, the
:c:func:`Py_INCREF` and :c:func:`Py_DECREF` functions are now implemented as
opaque function calls, rather than accessing directly the
:c:member:`PyObject.ob_refcnt` member, if Python is built in debug mode and
the ``Py_LIMITED_API`` macro targets Python 3.10 or newer. It became
possible to support the limited C API in debug mode because the
:c:type:`PyObject` structure is the same in release and debug mode since
Python 3.8 (see :issue:`36465`).
The limited C API is still not supported in the ``--with-trace-refs``
special build (``Py_TRACE_REFS`` macro).
Patch by Victor Stinner.
..
.. bpo: 43244
.. date: 2021-03-24-01-22-14
.. nonce: 31-97x
.. section: C API
Remove the ``pyarena.h`` header file with functions:
* ``PyArena_New()``
* ``PyArena_Free()``
* ``PyArena_Malloc()``
* ``PyArena_AddPyObject()``
These functions were undocumented, excluded from the limited C API, and were
only used internally by the compiler. Patch by Victor Stinner.
..
.. bpo: 43244
.. date: 2021-03-23-20-53-41
.. nonce: VK3sLH
.. section: C API
Remove the compiler and parser functions using ``struct _mod`` type, because
the public AST C API was removed:
* ``PyAST_Compile()``
* ``PyAST_CompileEx()``
* ``PyAST_CompileObject()``
* ``PyFuture_FromAST()``
* ``PyFuture_FromASTObject()``
* ``PyParser_ASTFromFile()``
* ``PyParser_ASTFromFileObject()``
* ``PyParser_ASTFromFilename()``
* ``PyParser_ASTFromString()``
* ``PyParser_ASTFromStringObject()``
These functions were undocumented and excluded from the limited C API. Patch
by Victor Stinner.
..
.. bpo: 43244
.. date: 2021-03-19-12-56-11
.. nonce: VuIyOD
.. section: C API
Remove ``ast.h``, ``asdl.h``, and ``Python-ast.h`` header files. These
functions were undocumented and excluded from the limited C API. Most names
defined by these header files were not prefixed by ``Py`` and so could
create names conflicts. For example, ``Python-ast.h`` defined a ``Yield``
macro which was conflict with the ``Yield`` name used by the Windows
``<winbase.h>`` header. Use the Python :mod:`ast` module instead. Patch by
Victor Stinner.
..
.. bpo: 43541
.. date: 2021-03-18-12-44-33
.. nonce: ICigzd
.. section: C API
Fix a ``PyEval_EvalCodeEx()`` regression: fix reference counting on
builtins. Patch by Victor Stinner.
..
.. bpo: 43244
.. date: 2021-03-17-23-53-14
.. nonce: kfPqA_
.. section: C API
Remove the ``symtable.h`` header file and the undocumented functions:
* ``PyST_GetScope()``
* ``PySymtable_Build()``
* ``PySymtable_BuildObject()``
* ``PySymtable_Free()``
* ``Py_SymtableString()``
* ``Py_SymtableStringObject()``
The ``Py_SymtableString()`` function was part the stable ABI by mistake but
it could not be used, because the ``symtable.h`` header file was excluded
from the limited C API.
The Python :mod:`symtable` module remains available and is unchanged.
Patch by Victor Stinner.
..
.. bpo: 43244
.. date: 2021-03-17-23-20-07
.. nonce: diyn2C
.. section: C API
Remove the ``PyAST_Validate()`` function. It is no longer possible to build
a AST object (``mod_ty`` type) with the public C API. The function was
already excluded from the limited C API (:pep:`384`). Patch by Victor
Stinner.
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