Corrupt .pth in site-packages

[NilsUUID]

Summary

I have this pyproject.toml file defining my environement :

pyproject.toml.txt

When I run uv sync the venv gets created without problems, but if I look in /.venv/Lib/site-packages I have some .pth files that are visibly corrupt:

distutils-precedence.pth.txt

pytest-cov.pth.txt

These corrupt files cause concern afterwards when running python scripts within the environement:

C:\Users\xxx\Documents\Dev\sandbox\uv_pth_corrupt>uv run python -V
error: Querying Python at `C:\Users\xxx\Documents\Dev\sandbox\uv_pth_corrupt\.venv\Scripts\python.exe` failed with exit status exit code: 1

[stderr]
Fatal Python error: init_import_site: Failed to import the site module
Python runtime state: initialized
Traceback (most recent call last):
  File "<frozen importlib._bootstrap>", line 1176, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1147, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 980, in exec_module
  File "<frozen site>", line 626, in <module>
  File "<frozen site>", line 609, in main
  File "<frozen site>", line 541, in venv
  File "<frozen site>", line 394, in addsitepackages
  File "<frozen site>", line 236, in addsitedir
  File "<frozen site>", line 188, in addpackage
  File "C:\xxx\Python\Python3.11-64\Lib\encodings\cp1252.py", line 23, in decode
    return codecs.charmap_decode(input,self.errors,decoding_table)[0]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
UnicodeDecodeError: 'charmap' codec can't decode byte 0x9d in position 41: character maps to <undefined>

As a consequence the virtual environment is unusable.

Platform

Windows 10

Version

0.6.1

Python version

3.11.9

[charliermarsh]

I can test this when I'm back home and have my Windows machine available. Alternatively, maybe @konstin or @Gankra can test.

[kdheepak]

I was having a possibly similar / possibly related issue on a colleague's computer. On Windows, we are seeing the following error:

Error processing line 1 of C:\Users\USERNAME\miniforge3\envs\conda-env-name\lib\site-packages\distutils-precedence.pth:

  Traceback (most recent call last):
    File "C:\Users\USERNAME\miniforge3\envs\conda-env-name\lib\site-packages\...", 
  ModuleNotFoundError: No module named '_distutils_hack'

In similar issues, people recommend pip install -U setuptools pip: conda/conda#11931

But that didn't work when we tried it.

I am using the following to install a uv managed environment into a conda environment:

conda activate conda-env-name
export UV_PROJECT_ENVIRONMENT=$CONDA_PREFIX
uv sync --all-extras --dev 

I'm not sure if this is because of the same issue as the OP. I can open a new issue if this happens again. One thing to note is that I've only seen this on a Windows 11 machine.

[Gankra]

I performed the following steps to try to reproduce on arm64 windows 11, uv 0.6.1 (unsuccessfully, everything worked fine for me):

uv init corrupt_uv_pth
<update pyproject.toml to what you have>
uv sync
<fails due to python version requirements>
uv python pin 3.11
uv sync
uv run python -V

It seems like an encoding mess but I can't tell what it would be... out of curiosity what's the windows Version in System Information? (Wondering if it's a really old win10 that lacks some system utf8 support...)

[NilsUUID]

I'm running win10 22h2 on an x86-64 platform.

[Gankra]

Thanks! That indeed should be well supported. (Which unfortunately means I'm not sure what could cause this...)

[notatallshaw]

I tried reproducing on Windows 10 22H2 inside a Powershell terminal window and couldn't reproduce:

PS C:\Users\damia\opensource\uv\11671> uv self update
info: Checking for updates...
success: Upgraded uv from v0.5.6 to v0.6.2! https://github.com/astral-sh/uv/releases/tag/0.6.2

PS C:\Users\damia\opensource\uv\11671> uv init corrupt_uv_pth
Initialized project `corrupt-uv-pth` at `C:\Users\damia\opensource\uv\11671\corrupt_uv_pth`

PS C:\Users\damia\opensource\uv\11671> cd .\corrupt_uv_pth\

~~ copied over pyproject.toml ~~

PS C:\Users\damia\opensource\uv\11671\corrupt_uv_pth> uv sync
Using CPython 3.10.15
error: The Python request from `.python-version` resolved to Python 3.10.15, which is incompatible with the project's Python requirement: `==3.11.*`. Use `uv python pin` to update the `.python-version` file to a compatible version.

PS C:\Users\damia\opensource\uv\11671\corrupt_uv_pth> uv python pin 3.11
warning: No interpreter found for Python 3.11 in managed installations, search path, or registry
Updated `.python-version` from `3.10` -> `3.11`

PS C:\Users\damia\opensource\uv\11671\corrupt_uv_pth> uv sync
Using CPython 3.11.11
Creating virtual environment at: .venv
Resolved 137 packages in 816ms
Prepared 134 packages in 11.05s
Installed 134 packages in 2.18s
 ~~ long list of packages ~~
 
PS C:\Users\damia\opensource\uv\11671\corrupt_uv_pth> uv run python -V
Python 3.11.11