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gh-131831: Implement PEP 758 – Allow except and except* expressions without parentheses (#131833)

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Pablo Galindo Salgado 2025-04-01 20:04:56 +01:00 • committed by GitHub
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Doc/reference/compound_stmts.rst
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@ -232,6 +232,8 @@ Additional information on exceptions can be found in section :ref:`exceptions`,
and information on using the :keyword:`raise` statement to generate exceptions
may be found in section :ref:`raise`.
.. versionchanged:: next
Support for optionally dropping grouping parentheses when using multiple exception types. See :pep:`758`.
.. _except:
@ -247,7 +249,8 @@ An expression-less :keyword:`!except` clause, if present, must be last;
it matches any exception.
For an :keyword:`!except` clause with an expression, the
expression must evaluate to an exception type or a tuple of exception types.
expression must evaluate to an exception type or a tuple of exception types. Parentheses
can be dropped if multiple exception types are provided and the ``as`` clause is not used.
The raised exception matches an :keyword:`!except` clause whose expression evaluates
to the class or a :term:`non-virtual base class <abstract base class>` of the exception object,
or to a tuple that contains such a class.