diff options
| author | Victor Stinner <vstinner@python.org> | 2022-11-03 16:53:25 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-11-03 16:53:25 (GMT) |
| commit | a60ddd31be7ff96a8189e7483bf1eb2071d2bddf (patch) | |
| tree | 61eacd702c4ecec19d1b7a4133e2916be9c955e4 /Misc | |
| parent | 916af11a976ca2faf0a8a77b0aaf71893e549cfe (diff) | |
| download | cpython-a60ddd31be7ff96a8189e7483bf1eb2071d2bddf.zip cpython-a60ddd31be7ff96a8189e7483bf1eb2071d2bddf.tar.gz cpython-a60ddd31be7ff96a8189e7483bf1eb2071d2bddf.tar.bz2 | |
gh-98401: Invalid escape sequences emits SyntaxWarning (#99011)
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.
Diffstat (limited to 'Misc')
| -rw-r--r-- | Misc/NEWS.d/next/Core and Builtins/2022-11-02-17-02-06.gh-issue-98401.y-dbVW.rst | 7 | ||||
| -rw-r--r-- | Misc/NEWS.d/next/Core and Builtins/2022-11-03-13-11-17.gh-issue-98401.CBS4nv.rst | 4 |
2 files changed, 11 insertions, 0 deletions
diff --git a/Misc/NEWS.d/next/Core and Builtins/2022-11-02-17-02-06.gh-issue-98401.y-dbVW.rst b/Misc/NEWS.d/next/Core and Builtins/2022-11-02-17-02-06.gh-issue-98401.y-dbVW.rst new file mode 100644 index 0000000..05b33c2 --- /dev/null +++ b/Misc/NEWS.d/next/Core and Builtins/2022-11-02-17-02-06.gh-issue-98401.y-dbVW.rst @@ -0,0 +1,7 @@ +A backslash-character pair that is not a valid escape sequence now generates a +:exc:`SyntaxWarning`, instead of :exc:`DeprecationWarning`. For example, +``re.compile("\d+\.\d+")`` now emits a :exc:`SyntaxWarning` (``"\d"`` is an +invalid escape sequence), use raw strings for regular expression: +``re.compile(r"\d+\.\d+")``. In a future Python version, :exc:`SyntaxError` +will eventually be raised, instead of :exc:`SyntaxWarning`. Patch by Victor +Stinner. diff --git a/Misc/NEWS.d/next/Core and Builtins/2022-11-03-13-11-17.gh-issue-98401.CBS4nv.rst b/Misc/NEWS.d/next/Core and Builtins/2022-11-03-13-11-17.gh-issue-98401.CBS4nv.rst new file mode 100644 index 0000000..fbfec10 --- /dev/null +++ b/Misc/NEWS.d/next/Core and Builtins/2022-11-03-13-11-17.gh-issue-98401.CBS4nv.rst @@ -0,0 +1,4 @@ +Octal escapes with value larger than ``0o377`` (ex: ``"\477"``), deprecated +in Python 3.11, now produce a :exc:`SyntaxWarning`, instead of +:exc:`DeprecationWarning`. In a future Python version they will be +eventually a :exc:`SyntaxError`. Patch by Victor Stinner. |