8000 Critical failure with `jupyter-core` 5.8.0 on Windows · Issue #1527 · jupyter-server/jupyter_server · GitHub
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Critical failure with jupyter-core 5.8.0 on Windows #1527
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Critical failure with jupyter-core 5.8.0 on Windows#1527
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@krassowski

Description

@krassowski
krassowski
opened on May 26, 2025

Description

Seen on jupyter/notebook#7653

jupyter_server/jupyter_server/extension/serverextension.py

Lines 22 to 42 in 4ee6e1d

def _get_config_dir(user: bool = False, sys_prefix: bool = False) -> str:
"""Get the location of config files for the current context
Returns the string to the environment
Parameters
----------
user : bool [default: False]
Get the user's .jupyter config directory
sys_prefix : bool [default: False]
Get sys.prefix, i.e. ~/.envs/my-env/etc/jupyter
"""
if user and sys_prefix:
sys_prefix = False
if user:
extdir = jupyter_config_dir()
elif sys_prefix:
extdir = ENV_CONFIG_PATH[0]
else:
extdir = SYSTEM_CONFIG_PATH[0]
return extdir

assumes that SYSTEM_CONFIG_PATH is not empty, however it was allowed to be empty and now by default is empty on Windows starting with 5.8.0 release.

Reproduce

  • Run on Windows with jupyter-core 5.8.0
  • Run jupyter labextension list

Expected behavior

No error

Context

None

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