python / python/cpython

singledispatch does not work with positional arguments with default values.

Open
#91,186 3 comments 1 reaction 0 assignees View on GitHub

Nobody has claimed this yet.

3.10 3.9 (EOL) stdlib type-feature
Dominant language
Python
Stars
77.2k
Forks
36k
PR merge metrics
PR metrics pending

Description

BPO 47030
Nosy @akulakov, @randolf-scholz

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

Show more details

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2022-03-15.18:46:49.092>
labels = ['type-feature', '3.9', '3.10']
title = 'singledispatch does not work with positional arguments with default values.'
updated_at = <Date 2022-03-22.03:50:00.049>
user = 'https://github.com/randolf-scholz'

bugs.python.org fields:

activity = <Date 2022-03-22.03:50:00.049>
actor = 'andrei.avk'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2022-03-15.18:46:49.092>
creator = 'randolf.scholz'
dependencies = []
files = []
hgrepos = []
issue_num = 47030
keywords = []
message_count = 2.0
messages = ['415274', '415740']
nosy_count = 2.0
nosy_names = ['andrei.avk', 'randolf.scholz']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue47030'
versions = ['Python 3.9', 'Python 3.10']

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 at the singledispatch entry point and reproduce the reported behavior with positional arguments that have default values. Determine the expected dispatch behavior and verify that such calls dispatch correctly, including regression coverage for the reported case.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
backend
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
28/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.