python / python/cpython

mimetypes.init() fails if no access to one of known files

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3.7 (EOL) 3.8 (EOL) 3.9 (EOL) stdlib type-bug
Dominant language
Python
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Forks
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Description

BPO 38672
Nosy @terryjreedy, @bitdancer, @maxking

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 2019-11-03.12:33:22.008>
labels = ['3.7', '3.8', 'type-bug', 'library', '3.9']
title = 'mimetypes.init() fails if no access to one of known files'
updated_at = <Date 2019-11-24.18:34:02.321>
user = 'https://bugs.python.org/MichaSzymaniak'

bugs.python.org fields:

activity = <Date 2019-11-24.18:34:02.321>
actor = 'r.david.murray'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2019-11-03.12:33:22.008>
creator = 'Micha\xc5\x82 Szymaniak'
dependencies = []
files = []
hgrepos = []
issue_num = 38672
keywords = []
message_count = 4.0
messages = ['355897', '355907', '356260', '357406']
nosy_count = 5.0
nosy_names = ['terry.reedy', 'r.david.murray', 'SilentGhost', 'maxking', 'Micha\xc5\x82 Szymaniak']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'test needed'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue38672'
versions = ['Python 3.7', 'Python 3.8', '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 at the mimetypes.init() entry point and reproduce the failure when one of the known files cannot be accessed. Trace how those files are read and identify the existing library tests for mimetypes. Done means initialization no longer fails solely because access to one known file is unavailable, with regression coverage added.

Written by the indexing model from the issue text.

Assessment

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

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