https://github.com/python/cpython/commit/3e256b9118eded25e6aca61e3939fd4e03b87082
commit: 3e256b9118eded25e6aca61e3939fd4e03b87082
branch: main
author: sobolevn <[email protected]>
committer: pablogsal <[email protected]>
date: 2025-05-03T19:18:40+02:00
summary:
gh-123539: Add new error message changes to "Whats New" (#133344)
files:
M Doc/whatsnew/3.14.rst
diff --git a/Doc/whatsnew/3.14.rst b/Doc/whatsnew/3.14.rst
index 9eac0dd787eff9..1ebf6efffd0177 100644
--- a/Doc/whatsnew/3.14.rst
+++ b/Doc/whatsnew/3.14.rst
@@ -479,6 +479,36 @@ Improved error messages
Traceback (most recent call last):
SyntaxError: invalid syntax. Is this intended to be part of the string?
+* When strings have incompatible prefixes, the error now shows
+ which prefixes are incompatible. (Contributed by
+ Nikita Sobolev in :gh:`133197`.)
+
+ .. code-block:: pycon
+
+ >>> ub'abc'
+ File "<python-input-0>", line 1
+ ub'abc'
+ ^^
+ SyntaxError: 'u' and 'b' prefixes are incompatible
+
+* Improved error messages when using ``as`` with incompatible targets in:
+
+ - Imports: ``import ... as ...``
+ - From imports: ``from ... import ... as ...``
+ - Except handlers: ``except ... as ...``
+ - Pattern-match cases: ``case ... as ...``
+
+ (Contributed by Nikita Sobolev in :gh:`123539`,
+ :gh:`123562`, and :gh:`123440`.)
+
+ .. code-block:: pycon
+
+ >>> import ast as arr[0]
+ File "<python-input-1>", line 1
+ import ast as arr[0]
+ ^^^^^^
+ SyntaxError: cannot use subscript as import target
+
.. _whatsnew314-pep741:
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