python / python/cpython

pprint does not work for typing.Mapping

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pending stdlib type-feature
Dominant language
Python
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Description

BPO 44580

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 = None
created_at = <Date 2021-07-07.13:28:25.933>
labels = ['3.8', 'type-bug', 'library']
title = 'pprint does not work for typing.Mapping'
updated_at = <Date 2021-07-07.13:33:00.739>
user = 'https://bugs.python.org/hclark'

bugs.python.org fields:

activity = <Date 2021-07-07.13:33:00.739>
actor = 'hclark'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2021-07-07.13:28:25.933>
creator = 'hclark'
dependencies = []
files = []
hgrepos = []
issue_num = 44580
keywords = []
message_count = 1.0
messages = ['397084']
nosy_count = 1.0
nosy_names = ['hclark']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue44580'
versions = ['Python 3.8']

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the reported pprint behavior with typing.Mapping and inspect the pprint implementation and its related tests. The issue provides no file, test, or reproduction details, so first establish the failing output and expected output. Done means pprint handles typing.Mapping as intended and the behavior is covered by a regression test.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
tooling
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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