python / python/cpython

mimetypes.guess_extension unable to get non-lowercase mimetype

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3.9 (EOL) stdlib type-bug
Dominant language
Python
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Forks
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PR merge metrics
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Description

BPO 39441
Nosy @inkhey, @iritkatriel

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 2020-01-24.09:50:19.046>
labels = ['type-bug', '3.9']
title = 'mimetypes.guess_extension unable to get non-lowercase mimetype'
updated_at = <Date 2022-01-15.17:46:52.069>
user = 'https://github.com/inkhey'

bugs.python.org fields:

activity = <Date 2022-01-15.17:46:52.069>
actor = 'iritkatriel'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2020-01-24.09:50:19.046>
creator = 'Inkhey'
dependencies = []
files = []
hgrepos = []
issue_num = 39441
keywords = []
message_count = 2.0
messages = ['360601', '410653']
nosy_count = 2.0
nosy_names = ['Inkhey', 'iritkatriel']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue39441'
versions = ['Python 3.9']

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 with the mimetypes.guess_extension entry point and reproduce the reported behavior for a non-lowercase MIME type. Done when the intended extension is returned and a regression test covers the case.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
backend
Issue type
Bug
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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