gh-128384: Use a context variable for warnings.catch_warnings (gh-130010)
Make `warnings.catch_warnings()` use a context variable for holding
the warning filtering state if the `sys.flags.context_aware_warnings`
flag is set to true. This makes using the context manager thread-safe in
multi-threaded programs.
Add the `sys.flags.thread_inherit_context` flag. If true, starting a new
thread with `threading.Thread` will use a copy of the context
from the caller of `Thread.start()`.
Both these flags are set to true by default for the free-threaded build
and false for the default build.
Move the Python implementation of warnings.py into _py_warnings.py.
gh-129987: Disable GCC SLP autovectorization for the interpreter loop on x86-64 (#132295)
The SLP autovectorizer can cause poor code generation for opcode dispatch, negating any benefit we get from vectorization elsewhere in the interpreter loop.
gh-130631: Make join_header_words() more similar to the original Perl version (GH-130632)
* Always quote strings with non-ASCII characters.
* Allow some non-separator and non-control characters (like "." or "-")
be unquoted.
* Always quote strings that end with "\n".
* Use the fullmatch() method for clarity and optimization.
gh-50333: Deprecate support of non-tuple sequences in PyArg_ParseTuple() (GH-128374)
Non-tuple sequences are deprecated as argument for the "(items)" format unit
in PyArg_ParseTuple() and other argument parsing functions if items contains
format units which store borrowed buffer or reference (e.g. "s" and "O").
str and bytearray are no longer accepted as valid sequences.
gh-61456: Add Thai language codec aliases (#15079)
Adding aliases for Thai language support. The current code page is an implementation of the windows code page.
This will alias '874', 'ms874', and 'windows_874' to cp874, adding Thai language support for those users.
Add support for disabling the use of `posix_spawn` via a variable in
the process environment.
While it was previously possible to toggle this by modifying the value
of `subprocess._USE_POSIX_SPAWN`, this required either patching CPython
or modifying it within the interpreter instance which is not always
possible, such as when running applications or scripts not under a
user's control.
Signed-off-by: Vincent Fazio <vfazio@gmail.com>
* fixup NEWS entry
Docs: Add a single table summary for ``cmath`` (#131887)
Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com> Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com> Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com> Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
gh-85162: Add `HTTPSServer` to `http.server` to serve files over HTTPS (#129607)
The `http.server` module now supports serving over HTTPS using the `http.server.HTTPSServer` class.
This functionality is also exposed by the command-line interface (`python -m http.server`) through the
`--tls-cert`, `--tls-key` and `--tls-password-file` options.
A new extension module, `_hmac`, now exposes the HACL* HMAC (formally verified) implementation.
The HACL* implementation is used as a fallback implementation when the OpenSSL implementation of HMAC
is not available or disabled. For now, only named hash algorithms are recognized and SIMD support provided
by HACL* for the BLAKE2 hash functions is not yet used.
gh-118761: Lazily import annotationlib in typing (#132060)
annotationlib is used quite a few times in typing.py, but I think the
usages are just rare enough that this makes sense.
The import would get triggered by:
- Using get_type_hints(), evaluate_forward_ref(), and similar introspection
functions
- Using a string annotation anywhere that goes through _type_convert (e.g.,
"Final['x']" will trigger an annotationlib import in order to access the
ForwardRef class).
- Creating a TypedDict or NamedTuple (unless it's empty or PEP 563 is on).
Lots of programs will want to use typing without any of these, so the tradeoff
seems worth it.
gh-131938: Update exception message for `Element.remove()` when an element is not found (#131972)
The exception message for `xml.etree.ElementTree.Element.remove` when an element is not found
has been updated from "list.remove(x): x not in list" to "Element.remove(x): element not found".
Vincent Fazio [Fri, 4 Apr 2025 14:31:37 +0000 (09:31 -0500)]
gh-130115: fix thread identifiers for 32-bit musl (#130391)
CPython's pthread-based thread identifier relies on pthread_t being able
to be represented as an unsigned integer type.
This is true in most Linux libc implementations where it's defined as an
unsigned long, however musl typedefs it as a struct *.
If the pointer has the high bit set and is cast to PyThread_ident_t, the
resultant value can be sign-extended [0]. This can cause issues when
comparing against threading._MainThread's identifier. The main thread's
identifier value is retrieved via _get_main_thread_ident which is backed
by an unsigned long which truncates sign extended bits.
Work around this by conditionally compiling in some code for non-glibc
based Linux platforms that are at risk of sign-extension to return a
PyLong based on the main thread's unsigned long thread identifier if the
current thread is the main thread.
projects / thirdparty / Python / cpython.git / log
