python-jupyterlab does not know how to open browser

[Kreijstal]

Description / Steps to reproduce the issue

Jupyter nor jupyterlab can't open browser, the reason is the path transformation is wrong they try to open "file:///C://" which windows does not find. However "file://C:/" will work, a workaround is to do path replacement like this

jupyter lab --browser "powershell start ('\"%s\"' -replace '\"//\"','\"/\"')"

Expected behavior

jupyter lab opens browser

Actual behavior

jupyter lab does not open browser like in every other distro

Verification

• I have verified that my MSYS2 is up-to-date before submitting the report (see https://www.msys2.org/docs/updating/)

Windows Version

MINGW64_NT-10.0-19045

MINGW environments affected

• MINGW64
• MINGW32
• UCRT64
• CLANG64
• CLANG32
• CLANGARM64

Are you willing to submit a PR?

No response

[Kreijstal]

this happens when starting it from msys2 bash

[Kreijstal]

Bug not from jupyter but from urllib

>>>from urllib.request import pathname2url
>>>pathname2url("C:/Users/kreij/AppData/Roaming/jupyter/runtime/jpserver-18504-open.html")
'///C://Users/kreij/AppData/Roaming/jupyter/runtime/jpserver-18504-open.html'

[Kreijstal]

python was fixed.
python/cpython#127078