Add _jupyter_server_extension_points in __init__.py

[krassowski]

Description

Jupyter Server, in recent versions, expects to find a _jupyter_server_extension_points function in jupyter_lsp. It falls back to using the _jupyter_server_extension_paths function, but warns that that function name will be deprecated in future releases of Jupyter Server.

Reproduce

1. Launch JupyterLab.
2. In the logs, see this warning:

[W 2023-12-15 12:34:56.789 ServerApp] A `_jupyter_server_extension_points` function was not found in jupyter_lsp. Instead, a `_jupyter_server_extension_paths` function was found and will be used for now. This function name will be deprecated in future releases of Jupyter Server.

Expected behavior

No warning.

Context

• Operating System and version: Ubuntu 22.04.3 LTS
• Browser and version: Firefox 120.0.1
• Jupyter Server version: 2.12.1

Troubleshoot Output

$ jupyter troubleshoot
$PATH:
    /home/user/mambaforge/condabin
    /usr/local/sbin
    /usr/local/bin
    /usr/sbin
    /usr/bin
    /sbin
    /bin
    /usr/games
    /usr/local/games
    /snap/bin
sys.path:

/usr/bin

/usr/lib/python310.zip

/usr/lib/python3.10

/usr/lib/python3.10/lib-dynload

/home/s/.local/lib/python3.10/site-packages

/usr/local/lib/python3.10/dist-packages

/usr/lib/python3/dist-packages

/usr/lib/python3.10/dist-packages
sys.executable:

/usr/bin/python3
sys.version:

3.10.12 (main, Nov 20 2023, 15:14:05) [GCC 11.4.0]
platform.platform():

Linux-6.5.0-14-generic-x86_64-with-glibc2.35
which -a jupyter:

/usr/bin/jupyter

/bin/jupyter
pip list:

Package                Version

---------------------- ----------------

anyio                  3.6.2

appdirs                1.4.4

apturl                 0.5.2

argon2-cffi            21.1.0

attrs                  21.2.0

Babel                  2.8.0

backcall               0.2.0

bcrypt                 3.2.0

beautifulsoup4         4.10.0

beniget                0.4.1

bleach                 4.1.0

blinker                1.4

bqplot                 0.12.36

brial                  1.0.2

Brlapi                 0.8.3

Brotli                 1.0.9

caffeine               2.9.8

certifi                2020.6.20

chardet                4.0.0

chrome-gnome-shell     0.0.0

click                  8.0.3

colorama               0.4.4

command-not-found      0.3

cryptography           3.4.8

cupshelpers            1.0

cycler                 0.11.0

dbus-python            1.2.18

debugpy                1.6.3

decorator              4.4.2

defer                  1.0.6

defusedxml             0.7.1

distlib                0.3.4

distro                 1.7.0

distro-info            1.1+ubuntu0.2

duplicity              0.8.21

entrypoints            0.4

ewmh                   0.1.6

fasteners              0.14.1

fastjsonschema         2.16.2

filelock               3.6.0

fonttools              4.29.1

fs                     2.4.12

future                 0.18.2

gast                   0.4.0

html5lib               1.1

httplib2               0.20.2

idna                   3.3

ifaddr                 0.1.7

importlib-metadata     4.6.4

ipydatagrid            1.1.13

ipykernel              6.7.0

ipython                7.31.1

ipython_genutils       0.2.0

ipywidgets             8.0.2

jedi                   0.18.0

jeepney                0.7.1

Jinja2                 3.0.3

json5                  0.9.10

jsonschema             3.2.0

jupyter-client         7.1.2

jupyter-console        6.4.0

jupyter-core           4.9.1

jupyterlab-pygments    0.1.2

jupyterlab_server      2.16.2

jupyterlab-widgets     3.0.3

keyring                23.5.0

kiwisolver             1.3.2

language-selector      0.1

launchpadlib           1.10.16

lazr.restfulclient     0.14.4

lazr.uri               1.0.6

lockfile               0.12.2

louis                  3.20.0

lxml                   4.8.0

lz4                    3.1.3+dfsg

macaroonbakery         1.3.1

Mako                   1.1.3

MarkupSafe             2.0.1

matplotlib             3.5.1

matplotlib-inline      0.1.3

mdurl                  0.1.2

monotonic              1.6

more-itertools         8.10.0

mpmath                 0.0.0

nbclassic              0.4.8

nbclient               0.5.6

nbconvert              6.4.0

nbformat               5.7.0

nbgrader               0.9.0a1

nest-asyncio           1.5.4

netifaces              0.11.0

notebook               6.4.8

notebook_shim          0.2.2

notify2                0.3

numpy                  1.21.5

numpy-stl              2.8.0

oauthlib               3.2.0

olefile                0.46

packaging              21.3

pandas                 1.5.1

pandocfilters          1.5.0

paramiko               2.9.3

parso                  0.8.1

pexpect                4.8.0

pickleshare            0.7.5

Pillow                 9.0.1

pip                    22.0.2

platformdirs           2.5.1

pluggy                 0.13.0

ply                    3.11

prometheus-client      0.9.0

prompt-toolkit         3.0.28

protobuf               3.12.4

ptyprocess             0.7.0

py                     1.10.0

py2vega                0.6.1

pycairo                1.20.1

pycups                 2.0.1

Pygments               2.11.2

PyGObject              3.42.1

PyJWT                  2.3.0

pymacaroons            0.13.0

PyNaCl                 1.5.0

pyparsing              2.4.7

PyQt5                  5.15.6

PyQt5-sip              12.9.1

pyRFC3339              1.1

pyrsistent             0.18.1

pyserial               3.5

python-apt             2.4.0+ubuntu2

python-dateutil        2.8.1

python-debian          0.1.43+ubuntu1.1

python-utils           2.2.0

python-xlib            0.29

pythran                0.10.0

pytz                   2022.1

pyxdg                  0.27

PyYAML                 5.4.1

pyzmq                  22.3.0

requests               2.25.1

scan_markyng           0.2

scipy                  1.8.0

scour                  0.38.2

SecretStorage          3.3.1

Send2Trash             1.8.1b0

sentry-sdk             1.4.3

setuptools             59.6.0

Shapely                1.8.0

six                    1.16.0

sniffio                1.3.0

soupsieve              2.3.1

ssh-import-id          5.11

sympy                  1.9

systemd-python         234

terminado              0.13.1

testpath               0.5.0

tinycss2               1.2.1

toml                   0.10.2

tomli                  2.0.1

tornado                6.1

tox                    3.21.4

traitlets              5.1.1

traittypes             0.2.1

ubuntu-advantage-tools 8001

ubuntu-drivers-common  0.0.0

ufoLib2                0.13.1

ufw                    0.36.1

unattended-upgrades    0.1

unicodedata2           14.0.0

urllib3                1.26.5

usb-creator            0.3.7

virtualenv             20.13.0+ds

wadllib                1.3.6

wcwidth                0.2.5

webencodings           0.5.1

websocket-client       1.4.2

wheel                  0.37.1

widgetsnbextension     4.0.3

xdg                    5

xkit                   0.0.0

zeroconf               0.38.3

zipp                   1.0.0
conda list:

# packages in environment at /home/s/mambaforge:

#

# Name                    Version                   Build  Channel

_libgcc_mutex             0.1                 conda_forge    conda-forge

_openmp_mutex             4.5                       2_gnu    conda-forge

boltons                   23.0.0             pyhd8ed1ab_0    conda-forge

brotlipy                  0.7.0           py311hd4cff14_1005    conda-forge

bzip2                     1.0.8                h7f98852_4    conda-forge

c-ares                    1.18.1               h7f98852_0    conda-forge

ca-certificates           2023.5.7             hbcca054_0    conda-forge

certifi                   2023.5.7           pyhd8ed1ab_0    conda-forge

cffi                      1.15.1          py311h409f033_3    conda-forge

charset-normalizer        3.1.0              pyhd8ed1ab_0    conda-forge

colorama                  0.4.6              pyhd8ed1ab_0    conda-forge

conda                     23.5.2          py311h38be061_0    conda-forge

conda-package-handling    2.0.2              pyh38be061_0    conda-forge

conda-package-streaming   0.7.0              pyhd8ed1ab_1    conda-forge

cryptography              40.0.2          py311h9b4c7bb_0    conda-forge

fmt                       9.1.0                h924138e_0    conda-forge

icu                       72.1                 hcb278e6_0    conda-forge

idna                      3.4                pyhd8ed1ab_0    conda-forge

jsonpatch                 1.32               pyhd8ed1ab_0    conda-forge

jsonpointer               2.0                        py_0    conda-forge

keyutils                  1.6.1                h166bdaf_0    conda-forge

krb5                      1.20.1               h81ceb04_0    conda-forge

ld_impl_linux-64          2.40                 h41732ed_0    conda-forge

libarchive                3.6.2                h3d51595_0    conda-forge

libcurl                   8.1.2                h409715c_0    conda-forge

libedit                   3.1.20191231         he28a2e2_2    conda-forge

libev                     4.33                 h516909a_1    conda-forge

libexpat                  2.5.0                hcb278e6_1    conda-forge

libffi                    3.4.2                h7f98852_5    conda-forge

libgcc-ng                 12.2.0              h65d4601_19    conda-forge

libgomp                   12.2.0              h65d4601_19    conda-forge

libiconv                  1.17                 h166bdaf_0    conda-forge

libmamba                  1.4.9                h658169a_0    conda-forge

libmambapy                1.4.9           py311h527f279_0    conda-forge

libnghttp2                1.52.0               h61bc06f_0    conda-forge

libnsl                    2.0.0                h7f98852_0    conda-forge

libsolv                   0.7.24               hfc55251_1    conda-forge

libsqlite                 3.42.0               h2797004_0    conda-forge

libssh2                   1.10.0               hf14f497_3    conda-forge

libstdcxx-ng              12.2.0              h46fd767_19    conda-forge

libuuid                   2.38.1               h0b41bf4_0    conda-forge

libxml2                   2.10.3               hfdac1af_6    conda-forge

libzlib                   1.2.13               h166bdaf_4    conda-forge

lz4-c                     1.9.4                hcb278e6_0    conda-forge

lzo                       2.10              h516909a_1000    conda-forge

mamba                     1.4.9           py311h3072747_0    conda-forge

ncurses                   6.4                  hcb278e6_0    conda-forge

openssl                   3.1.1                hd590300_1    conda-forge

packaging                 23.1               pyhd8ed1ab_0    conda-forge

pip                       23.0.1             pyhd8ed1ab_0    conda-forge

pluggy                    1.0.0              pyhd8ed1ab_5    conda-forge

pybind11-abi              4                    hd8ed1ab_3    conda-forge

pycosat                   0.6.4           py311hd4cff14_1    conda-forge

pycparser                 2.21               pyhd8ed1ab_0    conda-forge

pyopenssl                 23.1.1             pyhd8ed1ab_0    conda-forge

pysocks                   1.7.1              pyha2e5f31_6    conda-forge

python                    3.11.4          hab00c5b_0_cpython    conda-forge

python_abi                3.11                    3_cp311    conda-forge

readline                  8.2                  h8228510_1    conda-forge

reproc                    14.2.4               h0b41bf4_0    conda-forge

reproc-cpp                14.2.4               hcb278e6_0    conda-forge

requests                  2.28.2             pyhd8ed1ab_1    conda-forge

ruamel.yaml               0.17.32         py311h459d7ec_0    conda-forge

ruamel.yaml.clib          0.2.7           py311h2582759_1    conda-forge

setuptools                65.6.3             pyhd8ed1ab_0    conda-forge

tk                        8.6.12               h27826a3_0    conda-forge

toolz                     0.12.0             pyhd8ed1ab_0    conda-forge

tqdm                      4.65.0             pyhd8ed1ab_1    conda-forge

tzdata                    2023c                h71feb2d_0    conda-forge

urllib3                   1.26.15            pyhd8ed1ab_0    conda-forge

wheel                     0.40.0             pyhd8ed1ab_0    conda-forge

xz                        5.2.6                h166bdaf_0    conda-forge

yaml-cpp                  0.7.0                h27087fc_2    conda-forge

zstandard                 0.19.0          py311hbe0fcd7_1    conda-forge

zstd                      1.5.2                h3eb15da_6    conda-forge
conda env:

name: base

channels:

- conda-forge

dependencies:

- _libgcc_mutex=0.1=conda_forge

- _openmp_mutex=4.5=2_gnu

- boltons=23.0.0=pyhd8ed1ab_0

- brotlipy=0.7.0=py311hd4cff14_1005

- bzip2=1.0.8=h7f98852_4

- c-ares=1.18.1=h7f98852_0

- ca-certificates=2023.5.7=hbcca054_0

- certifi=2023.5.7=pyhd8ed1ab_0

- cffi=1.15.1=py311h409f033_3

- charset-normalizer=3.1.0=pyhd8ed1ab_0

- colorama=0.4.6=pyhd8ed1ab_0

- conda=23.5.2=py311h38be061_0

- conda-package-handling=2.0.2=pyh38be061_0

- conda-package-streaming=0.7.0=pyhd8ed1ab_1

- cryptography=40.0.2=py311h9b4c7bb_0

- fmt=9.1.0=h924138e_0

- icu=72.1=hcb278e6_0

- idna=3.4=pyhd8ed1ab_0

- jsonpatch=1.32=pyhd8ed1ab_0

- jsonpointer=2.0=py_0

- keyutils=1.6.1=h166bdaf_0

- krb5=1.20.1=h81ceb04_0

- ld_impl_linux-64=2.40=h41732ed_0

- libarchive=3.6.2=h3d51595_0

- libcurl=8.1.2=h409715c_0

- libedit=3.1.20191231=he28a2e2_2

- libev=4.33=h516909a_1

- libexpat=2.5.0=hcb278e6_1

- libffi=3.4.2=h7f98852_5

- libgcc-ng=12.2.0=h65d4601_19

- libgomp=12.2.0=h65d4601_19

- libiconv=1.17=h166bdaf_0

- libmamba=1.4.9=h658169a_0

- libmambapy=1.4.9=py311h527f279_0

- libnghttp2=1.52.0=h61bc06f_0

- libnsl=2.0.0=h7f98852_0

- libsolv=0.7.24=hfc55251_1

- libsqlite=3.42.0=h2797004_0

- libssh2=1.10.0=hf14f497_3

- libstdcxx-ng=12.2.0=h46fd767_19

- libuuid=2.38.1=h0b41bf4_0

- libxml2=2.10.3=hfdac1af_6

- libzlib=1.2.13=h166bdaf_4

- lz4-c=1.9.4=hcb278e6_0

- lzo=2.10=h516909a_1000

- mamba=1.4.9=py311h3072747_0

- ncurses=6.4=hcb278e6_0

- openssl=3.1.1=hd590300_1

- packaging=23.1=pyhd8ed1ab_0

- pip=23.0.1=pyhd8ed1ab_0

- pluggy=1.0.0=pyhd8ed1ab_5

- pybind11-abi=4=hd8ed1ab_3

- pycosat=0.6.4=py311hd4cff14_1

- pycparser=2.21=pyhd8ed1ab_0

- pyopenssl=23.1.1=pyhd8ed1ab_0

- pysocks=1.7.1=pyha2e5f31_6

- python=3.11.4=hab00c5b_0_cpython

- python_abi=3.11=3_cp311

- readline=8.2=h8228510_1

- reproc=14.2.4=h0b41bf4_0

- reproc-cpp=14.2.4=hcb278e6_0

- requests=2.28.2=pyhd8ed1ab_1

- ruamel.yaml=0.17.32=py311h459d7ec_0

- ruamel.yaml.clib=0.2.7=py311h2582759_1

- setuptools=65.6.3=pyhd8ed1ab_0

- tk=8.6.12=h27826a3_0

- toolz=0.12.0=pyhd8ed1ab_0

- tqdm=4.65.0=pyhd8ed1ab_1

- tzdata=2023c=h71feb2d_0

- urllib3=1.26.15=pyhd8ed1ab_0

- wheel=0.40.0=pyhd8ed1ab_0

- xz=5.2.6=h166bdaf_0

- yaml-cpp=0.7.0=h27087fc_2

- zstandard=0.19.0=py311hbe0fcd7_1

- zstd=1.5.2=h3eb15da_6

prefix: /home/s/mambaforge

Command Line Output

...
[W 2023-12-15 12:34:56.789 ServerApp] A `_jupyter_server_extension_points` function was not found in jupyter_lsp. Instead, a `_jupyter_server_extension_paths` function was found and will be used for now. This function name will be deprecated in future releases of Jupyter Server.
...

Browser Output

Not applicable.

Originally reported by @slel in jupyter-server org