Python 3.10 下载 (含兼容win7补丁)(32位版本)

+++++++++++ Python News +++++++++++ What's New in Python 3.10.0 alpha 7? ==================================== *Release date: 2021-04-05* Security -------- - bpo-42988: 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: :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: Add audit hooks for :func:`gc.get_objects`, :func:`gc.get_referrers` and :func:`gc.get_referents`. Patch by Pablo Galindo. Core and Builtins ----------------- - bpo-27129: Update CPython bytecode magic number. - bpo-43672: Raise ImportWarning when calling find_loader(). - bpo-43660: 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: 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: Fix reference leak in the :mod:`_hashopenssl` extension. Patch by Pablo Galindo. - bpo-42134: Calls to find_module() by the import system now raise ImportWarning. - bpo-41064: Improve the syntax error for invalid usage of double starred elements ('**') in f-strings. Patch by Pablo Galindo. - bpo-43575: Speed up calls to ``map()`` by using the :pep:`590` ``vectorcall`` calling convention. Patch by Dong-hee Na. - bpo-42137: The import system now prefers using ``__spec__`` for ``ModuleType.__repr__`` over ``module_repr()``. - bpo-43452: Added micro-optimizations to ``_PyType_Lookup()`` to improve cache lookup performance in the common case of cache hits. - bpo-43555: Report the column offset for :exc:`SyntaxError` for invalid line continuation characters. Patch by Pablo Galindo. - bpo-43517: Fix misdetection of circular imports when using ``from pkg.mod import attr``, which caused false positives in non-trivial multi-threaded code. - bpo-43497: Emit SyntaxWarnings for assertions with tuple constants, this is a regression introduced in python3.7 - bpo-39316: Tracing now has correct line numbers for attribute accesses when the the attribute is on a different line from the object. Improves debugging and profiling for multi-line method chains. - bpo-35883: 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: Fix a bug that was causing the parser to crash when emiting syntax errors when reading input from stdin. Patch by Pablo Galindo - bpo-43406: Fix a possible race condition where ``PyErr_CheckSignals`` tries to execute a non-Python signal handler. - bpo-42128: Add ``__match_args__`` to :c:type:`structsequence` based classes. Patch by Pablo Galindo. - bpo-43390: 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: Speed up calls to ``filter()`` by using the :pep:`590` ``vectorcall`` calling convention. Patch by Dong-hee Na. - bpo-37448: 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 <tim.peters@gmail.com> - bpo-29988: 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:`__exit__` is always called in with statements, even for interrupts. Library ------- - bpo-43720: Document various stdlib deprecations in imp, pkgutil, and importlib.util for removal in Python 3.12. - bpo-43433: :class:`xmlrpc.client.ServerProxy` no longer ignores query and fragment in the URL of the server. - bpo-31956: The :meth:`~array.array.index` method of :class:`array.array` now has optional *start* and *stop* parameters. - bpo-40066: 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: Deprecate all module_repr() methods found in importlib as their use is being phased out by Python 3.12. - bpo-35930: Raising an exception raised in a "future" instance will create reference cycles. - bpo-41369: Finish updating the vendored libmpdec to version 2.5.1. Patch by Stefan Krah. - bpo-43422: Revert the _decimal C API which was added in bpo-41324. - bpo-43577: Fix deadlock when using :class:`ssl.SSLContext` debug callback with :meth:`ssl.SSLContext.sni_callback`. - bpo-43571: It's now possible to create MPTCP sockets with IPPROTO_MPTCP - bpo-43542: ``image/heic`` and ``image/heif`` were added to :mod:`mimetypes`. - bpo-40645: The :mod:`hmac` module now uses OpenSSL's HMAC implementation when digestmod argument is a hash name or builtin hash function. - bpo-43510: Implement :pep:`597`: Add ``EncodingWarning`` warning, ``-X warn_default_encoding`` option, :envvar:`PYTHONWARNDEFAULTENCODING` environment variable and ``encoding="locale"`` argument value. - bpo-43521: ``ast.unparse`` can now render NaNs and empty sets. - bpo-42914: :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: :meth:`~collections.deque.rotate` calls are now slightly faster due to faster argument parsing. - bpo-43423: :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: 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: Add frozen modules to :data:`sys.stdlib_module_names`. For example, add ``"_frozen_importlib"`` and ``"_frozen_importlib_external"``