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PEP 847: add some context around multiple errors #5216

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brettcannon merged 2 commits into from
Nov 2, 2026
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PEP 847: add some context around multiple errors #5216

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PEP 847: add some context around multiple errors
woodruffw Nov 2, 2026
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woodruffw Nov 2, 2026
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9 changes: 6 additions & 3 deletions peps/pep-0847.rst
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Expand Up @@ -263,7 +263,8 @@ Another option is to diverge from :rfc:`9457`, and pick (or invent) another
error format. An argument in favor of this is specificity:
a custom error format could, for example, provide dedicated error
codes that communicate failure modes that are common/shared
across many index implementations and hosts.
across many index implementations and hosts. Similarly, a custom error
format could represent multiple errors from an index at once.

We consider this option unsuitable for two reasons:

Expand All @@ -272,8 +273,10 @@ We consider this option unsuitable for two reasons:
need custom representations for various authorization and authentication error
states.
#. :rfc:`9457` is *already* extensible, and a future PEP *could* added shared error
codes as a well-known extension in the future. In other words, any foreseeable
benefit from a custom format is already subsumable within the Problem Details format.
codes as a well-known extension in the future. Similarly, :rfc:`9457`'s design
enables multiple interior errors as an extension, per :rfc:`9457#section-3`.
In other words, the benefits of a custom format are already provided by the
Problem Details format.

.. _problem-details-appendix-1:

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