To recap: the objective is to make starred expressions valid in `subscription`,
which is used for generics: `Generic[...]`, `list[...]`, etc.
What _is_ gramatically valid in such contexts? Seemingly any of the following.
(At least, none of the following throw `SyntaxError` in a 3.12.3 REPL.)
Generic[x]
Generic[*x]
Generic[*x, y]
Generic[y, *x]
Generic[x := 1]
Generic[x := 1, y := 2]
So introducting
flexible_expression: expression | assignment_expression | starred_item
end then switching `subscription` to use `flexible_expression` sorts that.
But then we need to field `yield` - for which any of the following are
apparently valid:
yield x
yield x,
yield x, y
yield *x,
yield *x, *y
Introducing a separate `yield_list` is the simplest way I've been figure out to
do this - separating out the special case of `starred_item ,`.
Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
Using a standard library class makes this test difficult to maintain
as other tests and other parts of the stdlib may create subclasses,
which may still be alive when this test runs depending on GC timing.
Closes#123242. The real criterion is that the attribute does not
exist on heap types, but I don't think we should discuss heap vs.
static types in the language reference.
* gh-124370: Add "howto" for free-threaded Python
This is a guide aimed at people writing Python code, as oppposed to the
existing guide for C API extension authors.
* Add missing new line
* Update Doc/howto/free-threading-python.rst
Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
* interned -> immortalized
* Apply suggestions from code review
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
* Update Doc/howto/free-threading-python.rst
Co-authored-by: mpage <mpage@cs.stanford.edu>
* Update docs
* Apply suggestions from code review
Co-authored-by: Carol Willing <carolcode@willingconsulting.com>
* A few more updates
* Additional comment on immortal objects
* Mention specializing adaptive interpreter
* Remove trailing whitespace
* Remove mention of C macro
---------
Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
Co-authored-by: mpage <mpage@cs.stanford.edu>
Co-authored-by: Carol Willing <carolcode@willingconsulting.com>
The code changes for warning related to `__package__` landed in Python 3.12. `__cached__` doesn't have any changes as it isn't used but only set by the import system.
Remove the delegation of `int` to the `__trunc__` special method: `int` will now only delegate to `__int__` and `__index__` (in that order). `__trunc__` continues to exist, but its sole purpose is to support `math.trunc`.
---------
Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
PEP 667's description of the planned changes to PyEval_GetLocals
was internally inconsistent when accepted, so the docs added for
gh-74929 didn't match either the current behaviour or the intended
behaviour once gh-118934 is fixed.
This PR updates the documentation and 3.13 What's New to match the
intended behaviour (once gh-118934 is fixed).
It also tidies up lingering references to `f_locals` always being a
dictionary (this hasn't been true since at least when custom
namespace support for class statement execution was added)
* expand on What's New entry for PEP 667 (including porting notes)
* define 'optimized scope' as a glossary term
* cover comprehensions and generator expressions in locals() docs
* review all mentions of "locals" in documentation (updating if needed)
* review all mentions of "f_locals" in documentation (updating if needed)
This is *not* sufficient for the final 3.13 release, but it will do for beta 1:
- What's new entry
- Updated changelog entry (news blurb)
- Mention the proxy for f_globals in the datamodel and Python frame object docs
This doesn't have any C API details (what's new refers to the PEP).
In Lexical Analysis f-strings section, NULL in the description
of 'literal character' means '\0'. In the format_spec grammar
production, it is wrong with that meaning and redundant if
instead interpreted as <nothing>. Remove it there.
Matthew Rahtz
Jelle Zijlstra
Sam Gross
Alex Waygood
Thomas Grainger
Brett Cannon
Rafael Fontenelle
Benjamin Peterson
Lipták Attila (Flash)
Shaygan Hooshyari
CBerJun
Wei-Hsiang (Matt) Wang
sobolevn
Bénédikt Tran
Irit Katriel
Serhiy Storchaka
Jongbum Won
Danny Yang
chaen
Paulo Freitas
Mark Dickinson
Alyssa Coghlan
Guido van Rossum
Quazi Irfan
Hugo van Kemenade
Adorilson Bezerra
Terry Jan Reedy
Sunghyun Kim
Gouvernathor
Erlend E. Aasland
Daler
Christophe Papazian