python / python/cpython

mock_open does not support the use of 'seek()'

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3.11 stdlib type-feature
Dominant language
Python
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Description

BPO 44102
Nosy @rbtcollins, @cjw296, @voidspace, @lisroach, @mariocj89, @tirkarthi

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 2021-05-10.11:32:27.597>
labels = ['type-feature', 'library', '3.11']
title = "mock_open does not support the use of 'seek()'"
updated_at = <Date 2021-05-10.12:47:20.257>
user = 'https://bugs.python.org/nikle'

bugs.python.org fields:

activity = <Date 2021-05-10.12:47:20.257>
actor = 'xtreak'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2021-05-10.11:32:27.597>
creator = 'nikle'
dependencies = []
files = []
hgrepos = []
issue_num = 44102
keywords = []
message_count = 2.0
messages = ['393378', '393383']
nosy_count = 7.0
nosy_names = ['rbcollins', 'cjw296', 'michael.foord', 'lisroach', 'mariocj89', 'xtreak', 'nikle']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue44102'
versions = ['Python 3.11']

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 locating the standard-library implementation and tests for unittest.mock.mock_open. Reproduce the reported use of seek() and inspect the existing mock file-like behavior; the work is done when mock_open supports seek() and the behavior is covered by tests.

Written by the indexing model from the issue text.

Assessment

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

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