python / python/cpython

Document behavior of Path.symlink_to() when source already exists

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docs topic-pathlib
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Description

Documentation

The documentation for Path.symlink_to() [1] does not mention what happens when the source already exists, e.g.:

>>> from pathlib import Path
>>> Path("source").symlink_to("target1")
>>> Path("source").symlink_to("target2")
Traceback (most recent call last):
  File "<python-input-2>", line 1, in <module>
    Path("source").symlink_to("target2")
    ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^
  File "/usr/lib/python3.13/pathlib/_local.py", line 789, in symlink_to
    os.symlink(target, self, target_is_directory)
    ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
FileExistsError: [Errno 17] File exists: 'target2' -> 'source'

(The same applies to os.symlink [2] by the way)

Linked PRs
  • gh-132704
  • gh-132810

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 pathlib.Path.symlink_to() documentation linked in the issue, then compare the os.symlink() documentation for the same behavior. Done means both entries explain what happens when the destination path already exists, including the FileExistsError example shown here.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
documentation
Issue type
Documentation
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Stale
Clarity
Clearly specified
Newbie friendliness
25/100

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