gh-84978: Add float.from_number() and complex.from_number() (GH-26827)
They are alternate constructors which only accept numbers
(including objects with special methods __float__, __complex__
and __index__), but not strings.
gh-57141: Make shallow argument to filecmp.dircmp keyword-only (#121767)
It is our general practice to make new optional parameters keyword-only,
even if the existing parameters are all positional-or-keyword. Passing
this parameter as positional would look confusing and could be error-prone
if additional parameters are added in the future.
Bruno Lima [Sun, 14 Jul 2024 09:05:35 +0000 (06:05 -0300)]
gh-121562: optimized hex_from_char (#121563)
Performance improvement to `float.fromhex`: use a lookup table
for computing the hexadecimal value of a character, in place of the
previous switch-case construct. Patch by Bruno Lima.
gh-121153: Fix some errors with use of _PyLong_CompactValue() (GH-121154)
* The result has type Py_ssize_t, not intptr_t.
* Type cast between unsigned and signdet integer types should be explicit.
* Downcasting should be explicit.
* Fix integer overflow check in sum().
Sam Gross [Thu, 11 Jul 2024 20:21:37 +0000 (16:21 -0400)]
gh-121103: Put free-threaded libraries in `lib/python3.14t` (#121293)
On POSIX systems, excluding macOS framework installs, the lib directory
for the free-threaded build now includes a "t" suffix to avoid conflicts
with a co-located default build installation.
When builtin static types are initialized for a subinterpreter, various "tp" slots have already been inherited (for the main interpreter). This was interfering with the logic in add_operators() (in Objects/typeobject.c), causing a wrapper to get created when it shouldn't. This change fixes that by preserving the original data from the static type struct and checking that.
Sam Gross [Thu, 11 Jul 2024 14:21:09 +0000 (10:21 -0400)]
gh-121592: Make select.poll() and related objects thread-safe (#121594)
This makes select.poll() and kqueue() objects thread-safe in the
free-threaded build. Note that calling close() concurrently with other
functions is still not thread-safe due to races on file descriptors
(gh-121544).
Along the way, make the cache key in GitHub Actions for `config.cache` be more robust in the face of potential env var changes from `Tools/wasm/wasi.py`.
Sam Gross [Tue, 9 Jul 2024 16:11:43 +0000 (12:11 -0400)]
gh-117657: Fix TSAN races in setobject.c (#121511)
The `used` field must be written using atomic stores because `set_len`
and iterators may access the field concurrently without holding the
per-object lock.
Eric Snow [Mon, 8 Jul 2024 21:10:00 +0000 (15:10 -0600)]
gh-121110: Fix Extension Module Tests Under Py_TRACE_REFS Builds (gh-121503)
The change in gh-118157 (b2cd54a) should have also updated clear_singlephase_extension() but didn't. We fix that here. Note that clear_singlephase_extension() (AKA _PyImport_ClearExtension()) is only used in tests.
Sam Gross [Mon, 8 Jul 2024 18:52:07 +0000 (14:52 -0400)]
gh-121368: Fix seq lock memory ordering in _PyType_Lookup (#121388)
The `_PySeqLock_EndRead` function needs an acquire fence to ensure that
the load of the sequence happens after any loads within the read side
critical section. The missing fence can trigger bugs on macOS arm64.
Additionally, we need a release fence in `_PySeqLock_LockWrite` to
ensure that the sequence update is visible before any modifications to
the cache entry.
Barney Gale [Sat, 6 Jul 2024 16:18:39 +0000 (17:18 +0100)]
GH-73991: Support preserving metadata in `pathlib.Path.copy()` (#120806)
Add *preserve_metadata* keyword-only argument to `pathlib.Path.copy()`, defaulting to false. When set to true, we copy timestamps, permissions, extended attributes and flags where available, like `shutil.copystat()`. The argument has no effect on Windows, where metadata is always copied.
Internally (in the pathlib ABCs), path types gain `_readable_metadata` and `_writable_metadata` attributes. These sets of strings describe what kinds of metadata can be retrieved and stored. We take an intersection of `source._readable_metadata` and `target._writable_metadata` to minimise reads/writes. A new `_read_metadata()` method accepts a set of metadata keys and returns a dict with those keys, and a new `_write_metadata()` method accepts a dict of metadata. We *might* make these public in future, but it's hard to justify while the ABCs are still private.
Update example of str.split, bytes.split (#121287)
In `{str,bytes}.strip(chars)`, multiple characters are not treated as a
prefix/suffix, but as individual characters. This may make users confuse
whether `split` has similar behavior.
Users may incorrectly expect that
`'Good morning, John.'.split(', .') == ['Good', 'morning', 'John']`
gh-121288: Make error message for index() methods consistent (GH-121395)
Make error message for index() methods consistent
Remove the repr of the searched value (which can be arbitrary large)
from ValueError messages for list.index(), range.index(), deque.index(),
deque.remove() and ShareableList.index(). Make the error messages
consistent with error messages for other index() and remove()
methods.
The tracemalloc_tracebacks hash table has traceback keys and NULL
values, but its destructors do not reflect this -- key_destroy_func is
NULL while value_destroy_func is raw_free. Swap these to free the
traceback keys instead.