A backslash-character pair that is not a valid escape sequence now
generates a SyntaxWarning, instead of DeprecationWarning. For
example, re.compile("\d+\.\d+") now emits a SyntaxWarning ("\d" is an
invalid escape sequence), use raw strings for regular expression:
re.compile(r"\d+\.\d+"). In a future Python version, SyntaxError will
eventually be raised, instead of SyntaxWarning.
Octal escapes with value larger than 0o377 (ex: "\477"), deprecated
in Python 3.11, now produce a SyntaxWarning, instead of
DeprecationWarning. In a future Python version they will be
eventually a SyntaxError.
codecs.escape_decode() and codecs.unicode_escape_decode() are left
unchanged: they still emit DeprecationWarning.
* The parser only emits SyntaxWarning for Python 3.12 (feature
version), and still emits DeprecationWarning on older Python
versions.
* Fix SyntaxWarning by using raw strings in Tools/c-analyzer/ and
wasm_build.py.
* Add walrus operator to the index
* Add named expression to the index
Co-authored-by: Mariatta Wijaya <Mariatta@users.noreply.github.com>
* Fix indentation and add missing newline
Co-authored-by: Ezio Melotti <ezio.melotti@gmail.com>
Co-authored-by: Mariatta Wijaya <Mariatta@users.noreply.github.com>
Co-authored-by: Ezio Melotti <ezio.melotti@gmail.com>
In `_warnings.c`, in the C equivalent of `warnings.warn_explicit()`, if the module globals are given (and not None), the warning will attempt to get the source line for the issued warning. To do this, it needs the module's loader.
Previously, it would only look up `__loader__` in the module globals. In https://github.com/python/cpython/issues/86298 we want to defer to the `__spec__.loader` if available.
The first step on this journey is to check that `loader == __spec__.loader` and issue another warning if it is not. This commit does that.
Since this is a PoC, only manual testing for now.
```python
# /tmp/foo.py
import warnings
import bar
warnings.warn_explicit(
'warning!',
RuntimeWarning,
'bar.py', 2,
module='bar knee',
module_globals=bar.__dict__,
)
```
```python
# /tmp/bar.py
import sys
import os
import pathlib
# __loader__ = pathlib.Path()
```
Then running this: `./python.exe -Wdefault /tmp/foo.py`
Produces:
```
bar.py:2: RuntimeWarning: warning!
import os
```
Uncomment the `__loader__ = ` line in `bar.py` and try it again:
```
sys:1: ImportWarning: Module bar; __loader__ != __spec__.loader (<_frozen_importlib_external.SourceFileLoader object at 0x109f7dfa0> != PosixPath('.'))
bar.py:2: RuntimeWarning: warning!
import os
```
Automerge-Triggered-By: GH:warsaw
* gh-95975: Move except/*/finally ref labels to more precise locations
* Add section headers to fix :keyword: role and aid navigation
* Move see also to the introduction rather than a particular subsection
* Fix other minor Sphinx syntax issues with except
Co-authored-by: Ezio Melotti <ezio.melotti@gmail.com>
* Suppress redundant link to same section for except too
* Don't link try/except/else/finally keywords if in the same section
* Format try/except/finally as keywords in modified sections
Co-authored-by: Ezio Melotti <ezio.melotti@gmail.com>
If an HTTP link is redirected to a same looking HTTPS link, the latter can
be used directly without changes in readability and behavior.
It protects from a men-in-the-middle attack.
This change does not affect Python examples.
Support for bytes broke sometime between Python 3.2 and 3.6 and has been broken ever since. Trying to bring back supports is surprisingly difficult in the face of -b and checking for keys in sys.path_importer_cache. Since the support was broken for so long, trying to overcome the difficulty of bringing back the support has been deemed not worth it.
Co-authored-by: Eryk Sun <eryksun@gmail.com>
Co-authored-by: Brett Cannon <brett@python.org>
Victor Stinner
Hugo van Kemenade
Gerardwx
Stanley
Irit Katriel
BiscuitCandy
Jelle Zijlstra
Barry Warsaw
Brett Cannon
Terry Jan Reedy
Adam Turner
C.A.M. Gerlach
Ofey Chan
Andrew Kay
Jeff Allen
Benjamin Peterson
Jonathan Oberländer
Ezio Melotti
Serhiy Storchaka
July Tikhonov
Thomas Grainger
Ned Batchelder
luzpaz
Zackery Spytz
Robert Yang
Jiashuo Li
Michał D
Dave Goncalves
jmcb
David Gilbertson
Alex Waygood
Pablo Galindo Salgado
Kinshuk Dua
Julien Palard
Jacob Walls
Raymond Hettinger