argparse set_defaults on subcommands should override top level set_defaults

Assessment

This issue has not been assessed yet.

Description

assignee = None
closed_at = None
created_at = <Date 2010-07-23.14:06:50.789>
labels = ['type-bug', 'library']
title = 'argparse set_defaults on subcommands should override top level set_defaults'
updated_at = <Date 2021-10-27.21:44:47.104>
user = 'https://bugs.python.org/bethard'

activity = <Date 2021-10-27.21:44:47.104>
actor = 'paul.j3'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2010-07-23.14:06:50.789>
creator = 'bethard'
dependencies = []
files = ['27795']
hgrepos = []
issue_num = 9351
keywords = ['patch']
message_count = 21.0
messages = ['111324', '173602', '174147', '174206', '174208', '206993', '219332', '229619', '229620', '229968', '229983', '230056', '230084', '233041', '244768', '244786', '274369', '342154', '350638', '373665', '405130']
nosy_count = 12.0
nosy_names = ['bethard', 'ezio.melotti', 'r.david.murray', 'nailor', 'python-dev', 'petri.lehtinen', 'paul.j3', 'mikn', 'remram', 'Changaco', 'smparkes', 'shihai1991']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'needs patch'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue9351'
versions = ['Python 2.7', 'Python 3.4', 'Python 3.5']

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.

More from python/cpython

• docs: Zipfile contains a 13-years outdated warning regarding path sanitization Open
  docs pending

  Difficulty 2/5 1-3 hours Newbie friendliness 78/100

  python/cpython#157339 · 10 comments · Opened Sep 11, 2026

• pydoc HTML output is not responsive and has no viewport meta in released versions Open
  stdlib type-feature

  Difficulty 2/5 1-3 hours Newbie friendliness 78/100

  python/cpython#155601 · 2 comments · Opened Aug 12, 2026

• `zipfile.ZipFile.writestr()` raises `AttributeError` instead of accepting `os.PathLike` objects (e.g. `pathlib.Path`) Open
  stdlib type-feature

  Difficulty 2/5 1-3 hours Newbie friendliness 72/100

  python/cpython#153771 · 5 comments · Opened Jul 15, 2026

• BOLT-WARNING: specifying numeric value "1" for option -icf is deprecated Open
  build type-bug

  Difficulty 2/5 1-3 hours Newbie friendliness 76/100

  python/cpython#149708 · 1 comment · Opened May 12, 2026

• Expose message ID list from `ReferencesHeader` Open
  stdlib topic-email type-feature

  Difficulty 2/5 1-3 hours Newbie friendliness 70/100

  python/cpython#148797 · 3 comments · Opened Apr 20, 2026

All issues in python/cpython

Similar issues

• [Bug]: redact_sensitive_text does not recognise Discord bot tokens Open
  area/auth bug comp/agent P3 platform/discord type/security

  Difficulty 2/5 1-3 hours Newbie friendliness 88/100

  NousResearch/hermes-agent#117848 · Opened Sep 21, 2026

• [Bug]: notebooks/06_visualization_quickstart.ipynb fails: SHAPVisualizer.plot_waterfall raises IndexError Open

  Difficulty 2/5 1-3 hours Newbie friendliness 74/100

  bancolombia/sentinel#23 · Opened Sep 20, 2026

• test md Open
  CI

  Difficulty 2/5 1-3 hours Newbie friendliness 74/100

  sympy/sympy#30547 · 1 comment · Opened Sep 20, 2026

• quickjs: support `timeout=None` (no per-call deadline) in `CodeInterpreterMiddleware` Open
  integration:quickjs org:external priority:backlog topic:code-interpreter topic:middleware type:feature

  Difficulty 2/5 1-3 hours Newbie friendliness 74/100

  langchain-ai/deepagents#6450 · Opened Sep 20, 2026

• OpenAISamplingHandler drops ToolResultContent when a user message's list content also carries text/image blocks Open
  bug client

  Difficulty 2/5 1-3 hours Newbie friendliness 88/100

  PrefectHQ/fastmcp#5182 · 1 comment · Opened Sep 20, 2026

More Python issues