Fix sys.excepthook() and PyErr_Display() if a filename is a bytes
string. For example, for a SyntaxError exception where the filename
attribute is a bytes string.

Cleanup also test_sys:

* Sort imports.
* Rename numruns global var to INTERN_NUMRUNS.
* Add DisplayHookTest and ExceptHookTest test case classes.
* Don't save/restore sys.stdout and sys.displayhook using
  setUp()/tearDown(): do it in each test method.
* Test error case (call hook with no argument) after the success case.

bdist_wininst depends on MBCS codec, unavailable on non-Windows,
and bdist_wininst have not worked since at least Python 3.2, possibly
never on Python 3.

Here we document that bdist_wininst is only supported on Windows,
and we mark it unsupported otherwise to skip tests.

Distributors of Python 3 can now safely drop the bdist_wininst .exe files
without the need to skip bdist_wininst related tests.

bpo-37221: Add PyCode_NewWithPosOnlyArgs to be used internally and set PyCode_New as a compatibility wrapper (GH-13959)

Add PyCode_NewEx to be used internally and set PyCode_New as a compatibility wrapper

Post-handshake authentication is required for conditional client cert authentication with TLS 1.3.


https://bugs.python.org/issue37440

SSLContext.post_handshake_auth = True no longer sets
SSL_VERIFY_POST_HANDSHAKE verify flag for client connections. Although the
option is documented as ignored for clients, OpenSSL implicitly enables cert
chain validation when the flag is set.
Signed-off-by: Christian Heimes <christian@python.org>



https://bugs.python.org/issue37428

Subsequent -> subsequent

https://bugs.python.org/issue36168

bpo-35621: Support running subprocesses in asyncio when loop is executed in non-main thread  (GH-14344)

Add more fuzz testing for re.compile, re.load and csv.reader

* Added documentation for textwrap.dedent behavior.
* Remove an obsolete note about pre-2.5 behavior from the docstring.

sys._base_executable is now always defined on all platforms, and can be overridden through configuration.
Also adds test.support.PythonSymlink to encapsulate platform-specific logic for symlinking sys.executable

Also renamed the file to "test_pkg_import.py" to better follow the naming convention. Component of issue 19696.





https://bugs.python.org/issue19696

Add a versionadded for PS Core and note that `.venv` is a common virtual environment name.

* bpo-31783: Fix a race condition while creating workers during interpreter shutdown

* 📜🤖 Added by blurb_it.

As noted by @eryksun in [1] and [2], using _cleanup and _active(in
__del__) is not necessary on Windows, since:

> Unlike Unix, a process in Windows doesn't have to be waited on by
> its parent to avoid a zombie. Keeping the handle open will actually
> create a zombie until the next _cleanup() call, which may be never
> if Popen() isn't called again.

This patch simply defines `subprocess._active` as `None`, for which we already
have the proper logic in place in `subprocess.Popen.__del__`, that prevents it
from trying to append the process to the `_active`. This patch also defines
`subprocess._cleanup` as a noop for Windows.

[1] https://bugs.python.org/issue37380#msg346333
[2] https://bugs.python.org/issue36067#msg336262Signed-off-by: Ruslan Kuprieiev <ruslan@iterative.ai>

On Windows, test.pythoninfo now checks if support for long paths is
enabled using ntdll.RtlAreLongPathsEnabled() function.
Co-Authored-By: Eryk Sun <eryksun@gmail.com>

* Fix test for integer overflow.
* Add an unit test.

Don't call _Py_isabs() with a bytes string (char*), the function
expects as wide string.

Also updates some (unreleased) event names to be consistent with the others.

When libc_ver() is called with an executable, the
os.confstr('CS_GNU_LIBC_VERSION') fast-path cannot be taken. Modify
platform.platform() to call libc_ver() without executable, instead of
calling libc_ver(sys.executable), since sys.executable is already the
default value.

* Fix typo in supports_file2file_sendfile(); ensure that dst is
  removed
* Fix test_copytree_custom_copy_function(): remove dst tree.
  Use support.rmtree() rather than shutil.rmtree() to remove
  temporary directories: support tries harder.

https://bugs.python.org/issue37376