The behaviour is fully explained a couple paragraphs above, but it may be useful to have a brief example to cover the behaviour.
Automerge-Triggered-By: GH:hauntsaninja
Increase performance of the `absolute()` method by calling `os.getcwd()` directly, rather than using the `Path.cwd()` class method. This avoids constructing an extra `Path` object (and the parsing/normalization that comes with it).
Decrease performance of the `cwd()` class method by calling the `Path.absolute()` method, rather than using `os.getcwd()` directly. This involves constructing an extra `Path` object. We do this to maintain a longstanding pattern where `os` functions are called from only one place, which allows them to be more readily replaced by users. As `cwd()` is generally called at most once within user programs, it's a good bargain.
```shell
# before
$ ./python -m timeit -s 'from pathlib import Path; p = Path("foo", "bar")' 'p.absolute()'
50000 loops, best of 5: 9.04 usec per loop
# after
$ ./python -m timeit -s 'from pathlib import Path; p = Path("foo", "bar")' 'p.absolute()'
50000 loops, best of 5: 5.02 usec per loop
```
Automerge-Triggered-By: GH:AlexWaygood
(These aren't used yet, but may be coming soon,
and it's easier to keep this tool the same between branches.)
Added a sanity check for all this to compile.c.
Co-authored-by: Irit Katriel <iritkatriel@yahoo.com>
When executing the BUILD_LIST opcode, steal the references from the stack,
in a manner similar to the BUILD_TUPLE opcode. Implement this by offloading
the logic to a new private API, _PyList_FromArraySteal(), that works similarly
to _PyTuple_FromArraySteal().
This way, instead of performing multiple stack pointer adjustments while the
list is being initialized, the stack is adjusted only once and a fast memory
copy operation is performed in one fell swoop.
Fixes behaviour where int (and subtypes like bool) __sizeof__ under-reports true size as it did not take into account the size 1 `ob_digit` array for the zero int.
Co-authored-by: Mark Dickinson <dickinsm@gmail.com>
- Remove first link to lexical definition of integer literal, since it
doesn't apply (differs in handling of leading zeros, base needs to be
explicitly specified, unicode digits are allowed)
- Better describe handling of leading zeros, unicode digits, underscores
- Base 0 does not work exactly as like a code literal, since it allows
Unicode digits. Link code literal to lexical definition of integer
literal.
All the arguments are positional-only.
The current status after #99476 seems to be to not use positional-only
markers in documentation, hence I've simply removed it.
Not comprehensive, best effort warning. There are cases when threads exist on some platforms that this code cannot detect. macOS when API permissions allow and Linux with a readable /proc procfs present are the currently supported cases where a warning should show up reliably.
Starting with a DeprecationWarning for now, it is less disruptive than something like RuntimeWarning and most likely to only be seen in people's CI tests - a good place to start with this messaging.
Shantanu
Barney Gale
Zachary Ware
Guido van Rossum
Mark Shannon
Tzu-ping Chung
Brett Cannon
Christian Klein
Irit Katriel
David Lechner
Kumar Aditya
Ethan Furman
Christophe Nanteuil
L. A. F. Pereira
Thomas Grainger
Eli Schwartz
4l4k4z4m
Stanislav Zmiev
Ionite
Rupa Lahiri
Alexander Shadchin
Erlend E. Aasland
dependabot[bot]
Jason R. Coombs
Géry Ogam
ram vikram singh
Mehrdad Moradizadeh
Gabriele N. Tornetta
Terry Jan Reedy
Mark Hansen
Sandeep Subramanian
Owain Davies
tqxia
Paolo Lammens
Raymond Hettinger
Éric
mathieui
Nikita Sobolev
Gregory P. Smith