uv python list fails if a pyenv-win install is included in the windows registry #6524
Description
If a version of python is installed via pyenv with the --register flag then subsequently uv will fail to list python installs as it attempts to query metadata of a file that does not exist.
It looks like this is caused because uv makes the assumption that py --list-paths will return paths with only <major>.<minor> version information while pyenv installs are shown with <major>.<minor>.<micro>1. The regex is then capturing the <micro> part of the version as part of the path to the python executable.
uv/crates/uv-python/src/py_launcher.rs
Lines 36 to 39 in bbcd10d
Commands:
pyenv install 3.12.5 --register
uv python list
Full output:
C:\>uv --version
uv 0.3.2 (c5440001c 2024-08-23)
C:\>py --list
No installed Pythons found!
C:\>uv python list
cpython-3.12.5-windows-x86_64-none <download available>
cpython-3.11.9-windows-x86_64-none <download available>
cpython-3.10.14-windows-x86_64-none <download available>
cpython-3.9.19-windows-x86_64-none <download available>
cpython-3.8.19-windows-x86_64-none <download available>
pypy-3.7.13-windows-x86_64-none <download available>
C:\>pyenv install 3.12.5 --register
:: [Info] :: Mirror: https://www.python.org/ftp/python
:: [Installing] :: 3.12.5 ...
:: [Info] :: completed! 3.12.5
C:\>py --list-paths
-V:3.12.5 * C:\Users\ducks\.pyenv\pyenv-win\versions\3.12.5\python.exe
C:\>uv python list
error: Failed to query Python interpreter
Caused by: failed to query metadata of file `C:\.5 * C:\Users\ducks\.pyenv\pyenv-win\versions\3.12.5\python.exe`
Caused by: The filename, directory name, or volume label syntax is incorrect. (os error 123)
Example of py --list-paths output with multiple versions of python installed and registered with pyenv and some regular installs.2
-V:3.13.0rc1 * C:\Users\ducks\.pyenv\pyenv-win\versions\3.13.0rc1\python.exe
-V:3.12.5 C:\Users\ducks\.pyenv\pyenv-win\versions\3.12.5\python.exe
-V:3.12.5-win32 C:\Users\ducks\.pyenv\pyenv-win\versions\3.12.5-win32\python.exe
-V:3.12 C:\Users\ducks\AppData\Local\Programs\Python\Python312\python.exe
-V:3.12-32 C:\Users\ducks\AppData\Local\Programs\Python\Python312-32\python.exe
-V:3.11.9 C:\Users\ducks\.pyenv\pyenv-win\versions\3.11.9\python.exe
-V:3.10.11 C:\Users\ducks\.pyenv\pyenv-win\versions\3.10.11\python.exe
-V:3.9.13 C:\Users\ducks\.pyenv\pyenv-win\versions\3.9.13\python.exe
-V:3.8.10 C:\Users\ducks\.pyenv\pyenv-win\versions\3.8.10\python.exe