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

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Apr 1, 2025
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gh-131831: Implement PEP 758 – Allow except and except* expressions without parentheses #131833

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gh-131831: Implement PEP 758 – Allow except and except* expressions w…
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Apply suggestions from code review 
Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
Co-authored-by: Brian Schubert <brianm.schubert@gmail.com>
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@pablogsal @picnixz @brianschubert
3 people authored Mar 29, 2025
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23 changes: 13 additions & 10 deletions 23 Doc/whatsnew/3.14.rst
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Expand Up @@ -90,28 +90,31 @@ If you encounter :exc:`NameError`\s or pickling errors coming out of
New features
============

.. _whatsnew314-pep758:

PEP 758 – Allow except and except* expressions without parentheses
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------------------------------------------------------------------

The :keyword:`except` and :keyword:`except*` expressions now allow
The :keyword:`except` and :keyword:`except* <except_star>` expressions now allow
parentheses to be omitted when there is only one exception type.
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For example the following expressions are now valid:

.. code-block:: python

try:
release_new_sleep_token_album()
except AlbumNotFound, SongsTooGoodToBeReleased:
print("Sorry, no new album this year.")
try:
release_new_sleep_token_album()
except AlbumNotFound, SongsTooGoodToBeReleased:
print("Sorry, no new album this year.")

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try:
release_new_sleep_token_album()
except* AlbumNotFound, SongsTooGoodToBeReleased:
print("Sorry, no new album this year.")
try:
release_new_sleep_token_album()
except* AlbumNotFound, SongsTooGoodToBeReleased:
print("Sorry, no new album this year.")

Check :pep:`758` for more details.

(Contributed by Pablo Galindo and Brett Cannon in :issue:`131831`.)
(Contributed by Pablo Galindo and Brett Cannon in :gh:`131831`.)


.. _whatsnew314-pep649:

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