Description

vstinner

opened on Feb 29, 2012

Issue body actions

BPO	14162
Nosy	@vstinner
Files	frozendict.patch frozendict_builtins.patch type_final.patch

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2012-03-26.20:22:50.839>
created_at = <Date 2012-02-29.18:05:03.872>
labels = ['interpreter-core', 'type-feature']
title = 'PEP 416: Add a builtin frozendict type'
updated_at = <Date 2012-03-26.20:22:50.837>
user = 'https://github.com/vstinner'

bugs.python.org fields:

activity = <Date 2012-03-26.20:22:50.837>
actor = 'vstinner'
assignee = 'none'
closed = True
closed_date = <Date 2012-03-26.20:22:50.839>
closer = 'vstinner'
components = ['Interpreter Core']
creation = <Date 2012-02-29.18:05:03.872>
creator = 'vstinner'
dependencies = []
files = ['24685', '24690', '24696']
hgrepos = []
issue_num = 14162
keywords = ['patch']
message_count = 5.0
messages = ['154655', '154656', '154670', '154690', '156866']
nosy_count = 1.0
nosy_names = ['vstinner']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue14162'
versions = ['Python 3.3']

Linked PRs

• gh-141510 Update mapping methods in abstract.c to accept frozendict #150692
• gh-141510 Document and test frozendict class matching behaviour #150799

Activity

1. vstinner commented on Feb 29, 2012

   

   vstinner

   on Feb 29, 2012

   MemberAuthor

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   Patch to implement the PEP-416.
2. vstinner

   added

   interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

   type-featureA feature request or enhancementA feature request or enhancement

   on Feb 29, 2012
3. vstinner commented on Feb 29, 2012

   

   vstinner

   on Feb 29, 2012

   MemberAuthor

   More actions

   There is no documentation update yet.
4. vstinner commented on Mar 1, 2012

   

   vstinner

   on Mar 1, 2012

   MemberAuthor

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   frozendict_builtins.patch: make CPython supports frozendict for the __builtins__ mapping. It is an example of frozendict usage which helps my pysandbox project.
5. vstinner

   changed the title [-]Implementation of the PEP 416 (Add a builtin frozendict type)[/-] [+]PEP 416: Add a builtin frozendict type[/+] on Mar 1, 2012
6. vstinner commented on Mar 1, 2012

   

   vstinner

   on Mar 1, 2012

   MemberAuthor

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   Another frozendict usage example: freeze the dict of a new type if it contains __final__ in its namespace.

   Example:

   >>> class Classic:
   ...     pass
   ... 
   >>> Classic.attr=1
   >>> class FinalizedType:
   ...     __final__=True
   ... 
   >>> FinalizedType.attr=1
   (...)
   TypeError: 'frozendict' object does not support item assignment

   This patch is not part of the PEP-416 and is just a proof-of-concept.
7. vstinner commented on Mar 26, 2012

   

   vstinner

   on Mar 26, 2012

   MemberAuthor

   More actions

   The PEP has been rejected. See issue bpo-14386 for a new mappingview type.
8. vstinner

   closed this as completedon Mar 26, 2012
9. ezio-melotti

   transferred this issue fromon Apr 10, 2022
10. da-woods

    added a commit that references this issue on Jun 2, 2026

    pythongh-58370 Document and test frozendict class matching behaviour

    091478e

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