python / python/cpython

On Windows, shutil.move doesn't raise FileExistsError if dst exists like os.rename

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3.10 3.9 (EOL) OS-windows stdlib type-bug
Dominant language
Python
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Forks
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Description

BPO 42929
Nosy @pfmoore, @tjguk, @zware, @serhiy-storchaka, @eryksun, @zooba, @fireattack

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 2021-01-14.21:29:10.072>
labels = ['3.10', 'type-bug', 'library', '3.9', 'OS-windows']
title = "On Windows, shutil.move doesn't raise FileExistsError if dst exists like os.rename"
updated_at = <Date 2021-01-15.16:18:14.404>
user = 'https://github.com/fireattack'

bugs.python.org fields:

activity = <Date 2021-01-15.16:18:14.404>
actor = 'eryksun'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)', 'Windows']
creation = <Date 2021-01-14.21:29:10.072>
creator = 'fireattack'
dependencies = []
files = []
hgrepos = []
issue_num = 42929
keywords = []
message_count = 5.0
messages = ['385083', '385084', '385090', '385107', '385116']
nosy_count = 7.0
nosy_names = ['paul.moore', 'tim.golden', 'zach.ware', 'serhiy.storchaka', 'eryksun', 'steve.dower', 'fireattack']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue42929'
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

The issue names shutil.move and os.rename as the entry points; start by comparing their Windows behavior when dst already exists. Reproduce the case on Windows and locate the relevant library tests. The work is done when the requested FileExistsError behavior is covered by a regression test.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
operating-systems
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
38/100

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