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PEP-654: add mention of the syntax options discussion #2103

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Oct 8, 2021
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PEP-654: add mention of the syntax options discussion #2103

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PEP-654: add mention of the syntax options discussion
iritkatriel Oct 7, 2021
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Łukasz
iritkatriel Oct 8, 2021
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31 changes: 25 additions & 6 deletions pep-0654.rst
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Expand Up @@ -1375,6 +1375,22 @@ clauses. We rejected this because it would be less obvious. The fact that we
are handling exception groups of ``T`` rather than only naked ``Ts`` should be
specified in the same place where we state ``T``.

Alternative syntax options
--------------------------

Alternatives to the ``except*`` syntax were evaluated in a `discussion on python-dev
<http://groups.google.com/g/dev-python/c/G3p9_jovyus>`_, and it was suggested to use
``except group``. Upon careful evaluation this was rejected because the following
would be ambiguous, as it is currently valid syntax where ``group`` is interpreted
as a callable. The same is true for any valid identifier.

.. code-block::

try:
...
except group (T1, T2):
...


Programming Without 'except \*'
===============================
Expand Down Expand Up @@ -1441,12 +1457,15 @@ exception tree whose nodes are exceptions from MultiError, and the ``split()``
API from the design document for MultiError V2. The discussions on python-dev
and elsewhere helped us improve upon the first draft of the PEP in multiple
ways, both the design and the exposition. For this we appreciate all those who
contributed ideas and asked good questions: Matthew Barnett, Ran Benita,
Emily Bowman, Joao Bueno, Baptiste Carvello, Nick Coghlan, Caleb Donovick,
Greg Ewing, Ethan Furman, Larry Hastings, Zac Hatfield-Dodds, Chris Jerdonek,
Jim Jewett, Sven Kunze, Glenn Linderman, Paul Moore, Ivan Pozdeev, Terry Reedy,
Barry Scott, Damian Shaw, Cameron Simpson, Paul Sokolovsky, Steve Stagg,
Marco Sulla, and Petr Viktorin.
contributed ideas and asked good questions: Ammar Askar, Matthew Barnett,
Ran Benita, Emily Bowman, Brandt Bucher, Joao Bueno, Baptiste Carvello,
Rob Cliffe, Nick Coghlan, Steven D'Aprano, Caleb Donovick, Steve Dower,
Greg Ewing, Ethan Furman, Pablo Salgado, Jonathan Goble, Thomas Grainger,
Larry Hastings, Zac Hatfield-Dodds, Chris Jerdonek, Jim Jewett, Sven Kunze,
Łukasz Langa, Glenn Linderman, Paul Moore, Antoine Pitrou, Ivan Pozdeev,
Patrick Reader, Terry Reedy, Sascha Schlemmer, Barry Scott, Mark Shannon,
Damian Shaw, Cameron Simpson, Gregory Smith, Paul Sokolovsky, Calvin Spealman,
Steve Stagg, Victor Stinner, Marco Sulla, Petr Viktorin and Barry Warsaw.
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