Autocompletion stoped working

[sperezconesa]

Description

Hello,
I have installed jupyterlab-lsp with the instructions of the README and altough I have the most functionalities like code style marking, the tab-autocompletion does not work nor the automatic signature suggestions. I'm really happy with this extension but autocomplete is so crucial that I need to turn it off while coding.
Thank you very much for your help!
Best,
Sergio

Reproduce

I just tab when doing pd.Dat... and nothing appears

Expected behavior

Context

• Operating System and version: Ubuntu 18.04.3 LTS
• Browser and version: Version 80.0.3987.122 (Official Build) (64-bit)
• JupyterLab version: 2.1.5

Required: installed server extensions

Paste the output from running `jupyter serverextension list` from the command line here.
You may want to sanitize the paths in the output.

Required: installed lab extensions

config dir: /home/sperez/.jupyter
    jupyterlab_quickopen  enabled 
    - Validating...
Error loading server extension jupyterlab_quickopen
      X is jupyterlab_quickopen importable?
    jupyterlab_code_formatter  enabled 
    - Validating...
Error loading server extension jupyterlab_code_formatter
      X is jupyterlab_code_formatter importable?
    jupyterlab_templates.extension  enabled 
    - Validating...
Error loading server extension jupyterlab_templates.extension
      X is jupyterlab_templates.extension importable?
    nbdime  enabled 
    - Validating...
      nbdime 2.0.0 OK
config dir: /data/sperez/bin2/anaconda3/envs/lab_env/etc/jupyter
    jupyter_lsp  enabled 
    - Validating...
      jupyter_lsp 0.9.2 OK
    jupyter_conda  enabled 
    - Validating...
      jupyter_conda 3.4.1 OK
    jupyterlab  enabled 
    - Validating...
      jupyterlab 2.1.5 OK
    jupyterlab_git  enabled 
    - Validating...
      jupyterlab_git 0.21.1 OK
    nbdime  enabled 
    - Validating...
      nbdime 2.0.0 OK

Troubleshoot Output

$PATH:

/home/sperez/data_partition/bin2/gromacs-2020.2/gmx_api_no_gpu/bin

/Users/sperez/bin

/home/sperez/bin/msms

/data/sperez/bin2/anaconda3/envs/lab_env/bin

/data/sperez/bin2/anaconda3/condabin

/Users/sperez/bin

/home/sperez/bin/msms

/usr/local/sbin

/usr/local/bin

/usr/sbin

/usr/bin

/sbin

/bin

/usr/games

/usr/local/games

/snap/bin

/opt/thinlinc/bin

/home/sperez/bin

/home/sperez/bin/sparta_plus/SPARTA+

/home/sperez/bin

/home/sperez/bin/sparta_plus/SPARTA+
sys.path:

/data/sperez/bin2/anaconda3/envs/lab_env/bin

/home/sperez

/home/sperez/bin/PYTHON_SCRIPTS

/data/sperez/bin2/anaconda3/envs/lab_env/lib/python38.zip

/data/sperez/bin2/anaconda3/envs/lab_env/lib/python3.8

/data/sperez/bin2/anaconda3/envs/lab_env/lib/python3.8/lib-dynload

/data/sperez/bin2/anaconda3/envs/lab_env/lib/python3.8/site-packages
sys.executable:

/data/sperez/bin2/anaconda3/envs/lab_env/bin/python
sys.version:

3.8.5 | packaged by conda-forge | (default, Aug 29 2020, 01:22:49)

[GCC 7.5.0]
platform.platform():

Linux-4.15.0-65-generic-x86_64-with-glibc2.10
which -a jupyter:

/data/sperez/bin2/anaconda3/envs/lab_env/bin/jupyter
pip list:

Package                       Version

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

argon2-cffi                   20.1.0

asciitree                     0.3.3

astroid                       2.4.2

attrs                         20.2.0

autopep8                      1.5.4

backcall                      0.2.0

backports.functools-lru-cache 1.6.1

biopython                     1.78

bleach                        3.1.5

brotlipy                      0.7.0

certifi                       2020.6.20

cffi                          1.14.1

cftime                        1.2.1

chardet                       3.0.4

colorama                      0.4.3

cryptography                  3.1

cycler                        0.10.0

datreant                      1.0.2

decorator                     4.4.2

defusedxml                    0.6.0

entrypoints                   0.3

flake8                        3.8.3

future                        0.18.2

fuzzywuzzy                    0.18.0

gitdb                         4.0.5

GitPython                     3.1.8

gmxapi                        0.2.0a1

GridDataFormats               0.5.0

gsd                           2.2.0

idna                          2.10

importlib-metadata            1.7.0

ipykernel                     5.3.4

ipympl                        0.5.7

ipython                       7.18.1

ipython-genutils              0.2.0

ipywidgets                    7.5.1

isort                         5.5.1

jedi                          0.17.2

Jinja2                        2.11.2

joblib                        0.16.0

json5                         0.9.4

jsonschema                    3.2.0

jupyter-client                6.1.7

jupyter-conda                 3.4.1

jupyter-core                  4.6.3

jupyter-lsp                   0.9.2

jupyterlab                    2.1.5

jupyterlab-git                0.21.1

jupyterlab-server             1.2.0

kiwisolver                    1.2.0

lazy-object-proxy             1.4.3

MarkupSafe                    1.1.1

matplotlib                    3.3.1

mccabe                        0.6.1

MDAnalysis                    1.0.0

mistune                       0.8.4

mmtf-python                   1.1.2

msgpack                       1.0.0

nb-conda-kernels              2.2.4

nbconvert                     5.6.1

nbdime                        2.0.0

nbformat                      5.0.7

netCDF4                       1.5.4

networkx                      2.5

nglview                       2.7.7

notebook                      6.1.3

numpy                         1.19.1

olefile                       0.46

packaging                     20.4

pandas                        1.1.1

pandocfilters                 1.4.2

parso                         0.7.1

pathlib2                      2.3.5

patsy                         0.5.1

pexpect                       4.8.0

pickleshare                   0.7.5

Pillow                        7.2.0

pip                           20.2.2

pluggy                        0.13.1

prometheus-client             0.8.0

prompt-toolkit                3.0.7

ptyprocess                    0.6.0

pycodestyle                   2.6.0

pycparser                     2.20

pydocstyle                    5.1.1

pyflakes                      2.2.0

Pygments                      2.6.1

pylint                        2.6.0

pyOpenSSL                     19.1.0

pyparsing                     2.4.7

pyrsistent                    0.16.0

PySocks                       1.7.1

python-dateutil               2.8.1

python-jsonrpc-server         0.3.4

python-language-server        0.34.1

python-Levenshtein            0.12.0

pytz                          2020.1

pyzmq                         19.0.2

requests                      2.24.0

rope                          0.17.0

scandir                       1.10.0

scikit-learn                  0.23.2

scipy                         1.5.2

seaborn                       0.10.1

Send2Trash                    1.5.0

setuptools                    49.6.0.post20200814

six                           1.15.0

smmap                         3.0.4

snowballstemmer               2.0.0

statsmodels                   0.12.0

terminado                     0.8.3

testpath                      0.4.4

threadpoolctl                 2.1.0

toml                          0.10.1

tornado                       6.0.4

tqdm                          4.48.2

traitlets                     4.3.3

ujson                         1.35

urllib3                       1.25.10

wcwidth                       0.2.5

webencodings                  0.5.1

wheel                         0.35.1

widgetsnbextension            3.5.1

wrapt                         1.11.2

yapf                          0.30.0

zipp                          3.1.0
conda list:

# packages in environment at /data/sperez/bin2/anaconda3/envs/lab_env:

#

# Name                    Version                   Build  Channel

_libgcc_mutex             0.1                 conda_forge    conda-forge

_openmp_mutex             4.5                       1_gnu    conda-forge

argon2-cffi               20.1.0           py38h1e0a361_1    conda-forge

asciitree                 0.3.3                    pypi_0    pypi

astroid                   2.4.2            py38h32f6830_0    conda-forge

attrs                     20.2.0             pyh9f0ad1d_0    conda-forge

autopep8                  1.5.4              pyh9f0ad1d_0    conda-forge

backcall                  0.2.0              pyh9f0ad1d_0    conda-forge

backports                 1.0                        py_2    conda-forge

backports.functools_lru_cache 1.6.1                      py_0    conda-forge

biopython                 1.78             py38h1e0a361_0    conda-forge

bleach                    3.1.5              pyh9f0ad1d_0    conda-forge

brotlipy                  0.7.0           py38h1e0a361_1000    conda-forge

bzip2                     1.0.8                h516909a_3    conda-forge

c-ares                    1.16.1               h516909a_3    conda-forge

ca-certificates           2020.7.22                     0

certifi                   2020.6.20                py38_0

cffi                      1.14.1           py38h5bae8af_0    conda-forge

cftime                    1.2.1            py38h8790de6_0    conda-forge

chardet                   3.0.4           py38h32f6830_1006    conda-forge

colorama                  0.4.3                      py_0    conda-forge

cryptography              3.1              py38h766eaa4_0    conda-forge

curl                      7.71.1               he644dc0_5    conda-forge

cycler                    0.10.0                     py_2    conda-forge

datreant                  1.0.2                    pypi_0    pypi

decorator                 4.4.2                      py_0    conda-forge

defusedxml                0.6.0                      py_0    conda-forge

entrypoints               0.3             py38h32f6830_1001    conda-forge

flake8                    3.8.3                      py_0

freetype                  2.10.2               he06d7ca_0    conda-forge

future                    0.18.2           py38h32f6830_1    conda-forge

fuzzywuzzy                0.18.0                   pypi_0    pypi

gitdb                     4.0.5                      py_0    conda-forge

gitpython                 3.1.8                      py_0    conda-forge

gmxapi                    0.2.0a1                  pypi_0    pypi

griddataformats           0.5.0                      py_0    conda-forge

gsd                       2.2.0            py38hab2c0dc_0    conda-forge

hdf4                      4.2.13            hf30be14_1003    conda-forge

hdf5                      1.10.6          nompi_h3c11f04_101    conda-forge

icu                       67.1                 he1b5a44_0    conda-forge

idna                      2.10               pyh9f0ad1d_0    conda-forge

importlib-metadata        1.7.0            py38h32f6830_0    conda-forge

importlib_metadata        1.7.0                         0    conda-forge

ipykernel                 5.3.4            py38h23f93f0_0    conda-forge

ipympl                    0.5.7                    pypi_0    pypi

ipython                   7.18.1           py38h1cdfbd6_0    conda-forge

ipython_genutils          0.2.0                      py_1    conda-forge

ipywidgets                7.5.1                      py_0    conda-forge

isort                     5.5.1            py38h32f6830_0    conda-forge

jedi                      0.17.2           py38h32f6830_0    conda-forge

jinja2                    2.11.2             pyh9f0ad1d_0    conda-forge

joblib                    0.16.0                     py_0    conda-forge

jpeg                      9d                   h516909a_0    conda-forge

json5                     0.9.4              pyh9f0ad1d_0    conda-forge

jsonschema                3.2.0            py38h32f6830_1    conda-forge

jupyter-lsp               0.9.2                    pypi_0    pypi

jupyter_client            6.1.7                      py_0    conda-forge

jupyter_conda             3.4.1              pyh9f0ad1d_0    conda-forge

jupyter_core              4.6.3            py38h32f6830_1    conda-forge

jupyterlab                2.1.5                      py_0    conda-forge

jupyterlab-git            0.21.1                     py_0    conda-forge

jupyterlab_server         1.2.0                      py_0    conda-forge

kiwisolver                1.2.0            py38hbf85e49_0    conda-forge

krb5                      1.17.1               hfafb76e_3    conda-forge

lazy-object-proxy         1.4.3            py38h1e0a361_2    conda-forge

lcms2                     2.11                 hbd6801e_0    conda-forge

ld_impl_linux-64          2.34                 hc38a660_9    conda-forge

libblas                   3.8.0               17_openblas    conda-forge

libcblas                  3.8.0               17_openblas    conda-forge

libcurl                   7.71.1               hcdd3856_5    conda-forge

libedit                   3.1.20191231         he28a2e2_2    conda-forge

libev                     4.33                 h516909a_1    conda-forge

libffi                    3.2.1             he1b5a44_1007    conda-forge

libgcc-ng                 9.3.0               h24d8f2e_16    conda-forge

libgfortran-ng            7.5.0               hdf63c60_16    conda-forge

libgomp                   9.3.0               h24d8f2e_16    conda-forge

liblapack                 3.8.0               17_openblas    conda-forge

libnetcdf                 4.7.4           nompi_h84807e1_105    conda-forge

libnghttp2                1.41.0               h8cfc5f6_2    conda-forge

libopenblas               0.3.10          pthreads_hb3c22a3_4    conda-forge

libpng                    1.6.37               hed695b0_2    conda-forge

libsodium                 1.0.18               h516909a_0    conda-forge

libssh2                   1.9.0                hab1572f_5    conda-forge

libstdcxx-ng              9.3.0               hdf63c60_16    conda-forge

libtiff                   4.1.0                hc7e4089_6    conda-forge

libuv                     1.39.0               h516909a_0    conda-forge

libwebp-base              1.1.0                h516909a_3    conda-forge

lz4-c                     1.9.2                he1b5a44_3    conda-forge

markupsafe                1.1.1            py38h1e0a361_1    conda-forge

matplotlib-base           3.3.1            py38h91b0d89_1    conda-forge

mccabe                    0.6.1                    py38_1

mdanalysis                1.0.0            py38h950e882_0    conda-forge

mistune                   0.8.4           py38h1e0a361_1001    conda-forge

mmtf-python               1.1.2                      py_0    conda-forge

msgpack-python            1.0.0            py38hbf85e49_1    conda-forge

nb_conda_kernels          2.2.4            py38h32f6830_0    conda-forge

nbconvert                 5.6.1            py38h32f6830_1    conda-forge

nbdime                    2.0.0                      py_1    conda-forge

nbformat                  5.0.7                      py_0    conda-forge

ncurses                   6.2                  he1b5a44_1    conda-forge

netcdf4                   1.5.4           nompi_py38hec8b9af_102    conda-forge

networkx                  2.5                        py_0    conda-forge

nglview                   2.7.7              pyh5ca1d4c_1    conda-forge

nodejs                    14.9.0               h568c755_0    conda-forge

notebook                  6.1.3            py38h32f6830_0    conda-forge

numpy                     1.19.1           py38hbc27379_2    conda-forge

olefile                   0.46                       py_0    conda-forge

openssl                   1.1.1g               h7b6447c_0

packaging                 20.4               pyh9f0ad1d_0    conda-forge

pandas                    1.1.1            py38h950e882_0    conda-forge

pandoc                    2.10.1               h516909a_0    conda-forge

pandocfilters             1.4.2                      py_1    conda-forge

parso                     0.7.1              pyh9f0ad1d_0    conda-forge

pathlib2                  2.3.5                    pypi_0    pypi

patsy                     0.5.1                      py_0    conda-forge

pexpect                   4.8.0            py38h32f6830_1    conda-forge

pickleshare               0.7.5           py38h32f6830_1001    conda-forge

pillow                    7.2.0            py38h9776b28_1    conda-forge

pip                       20.2.2                     py_0    conda-forge

pluggy                    0.13.1           py38h32f6830_2    conda-forge

prometheus_client         0.8.0              pyh9f0ad1d_0    conda-forge

prompt-toolkit            3.0.7                      py_0    conda-forge

ptyprocess                0.6.0                   py_1001    conda-forge

pycodestyle               2.6.0                      py_0

pycparser                 2.20               pyh9f0ad1d_2    conda-forge

pydocstyle                5.1.1                      py_0    conda-forge

pyflakes                  2.2.0                      py_0

pygments                  2.6.1                      py_0    conda-forge

pylint                    2.6.0            py38h32f6830_0    conda-forge

pyopenssl                 19.1.0                     py_1    conda-forge

pyparsing                 2.4.7              pyh9f0ad1d_0    conda-forge

pyrsistent                0.16.0           py38h1e0a361_0    conda-forge

pysocks                   1.7.1            py38h32f6830_1    conda-forge

python                    3.8.5           h1103e12_7_cpython    conda-forge

python-dateutil           2.8.1                      py_0    conda-forge

python-jsonrpc-server     0.3.4              pyh9f0ad1d_1    conda-forge

python-language-server    0.34.1           py38h32f6830_0    conda-forge

python-levenshtein        0.12.0                   pypi_0    pypi

python_abi                3.8                      1_cp38    conda-forge

pytz                      2020.1             pyh9f0ad1d_0    conda-forge

pyzmq                     19.0.2           py38ha71036d_0    conda-forge

readline                  8.0                  he28a2e2_2    conda-forge

requests                  2.24.0             pyh9f0ad1d_0    conda-forge

rope                      0.17.0                     py_0

scandir                   1.10.0                   pypi_0    pypi

scikit-learn              0.23.2           py38hee58b96_0    conda-forge

scipy                     1.5.2            py38h8c5af15_0    conda-forge

seaborn                   0.10.1                        1    conda-forge

seaborn-base              0.10.1                     py_1    conda-forge

send2trash                1.5.0                      py_0    conda-forge

setuptools                49.6.0           py38h32f6830_0    conda-forge

six                       1.15.0             pyh9f0ad1d_0    conda-forge

smmap                     3.0.4              pyh9f0ad1d_0    conda-forge

snowballstemmer           2.0.0                      py_0    conda-forge

sqlite                    3.33.0               h4cf870e_0    conda-forge

statsmodels               0.12.0           py38h1e0a361_0    conda-forge

terminado                 0.8.3            py38h32f6830_1    conda-forge

testpath                  0.4.4                      py_0    conda-forge

threadpoolctl             2.1.0              pyh5ca1d4c_0    conda-forge

tk                        8.6.10               hed695b0_0    conda-forge

toml                      0.10.1             pyh9f0ad1d_0    conda-forge

tornado                   6.0.4            py38h1e0a361_1    conda-forge

tqdm                      4.48.2             pyh9f0ad1d_0    conda-forge

traitlets                 4.3.3            py38h32f6830_1    conda-forge

ujson                     1.35            py38h950e882_1002    conda-forge

urllib3                   1.25.10                    py_0    conda-forge

wcwidth                   0.2.5              pyh9f0ad1d_1    conda-forge

webencodings              0.5.1                      py_1    conda-forge

wheel                     0.35.1             pyh9f0ad1d_0    conda-forge

widgetsnbextension        3.5.1            py38h32f6830_1    conda-forge

wrapt                     1.11.2           py38h1e0a361_0    conda-forge

xz                        5.2.5                h516909a_1    conda-forge

yapf                      0.30.0             pyh9f0ad1d_0    conda-forge

zeromq                    4.3.2                he1b5a44_3    conda-forge

zipp                      3.1.0                      py_0    conda-forge

zlib                      1.2.11            h516909a_1009    conda-forge

zstd                      1.4.5                h6597ccf_2    conda-forge

Command Line Output

Paste the output from your command line running `jupyter lab` here, use `--debug` if possible.

Browser Output

![image](https://user-images.githubusercontent.com/27727343/92454783-3184f280-f1c1-11ea-9272-d525c81d8d32.png)

[krassowski]

Hi @sperezconesa, thank you for your report. Three quick questions:

• which exact frontend extension version are you using (recently I released a 2.0.2 patch which could have helped a bit)?
• would you be able to provide an example notebook where it happens?
• does it also happen in .py files, or is completer there ok?

My first guess would be it might have to do with the performance (from the browser output you show it seem that the completer does work, but it could be just to slow to be useful at all), see #336 - but if you can reproduce it with a small notebook I would start looking elsewhere for the problem.

[krassowski]

Wait, I just saw that you use JupyterLab 2.1.5. The most recent version of this extension (2.0) requires JupyterLab 2.2 because there were breaking changes related to completion in JupyterLab 2.2 release - this is a likely reason why the completer might not be showing up for you. If you are using 2.0, would you be able to upgrade JupyterLab?

[sperezconesa]

Great! now it works.

It is a bit slow... Could it be because I have several:

  "language_servers": {
    "pyls": {
      "serverSettings": {
        "pyls.plugins.pydocstyle.enabled": true,
        "pyls.plugins.pyflakes.enabled": true,
        "pyls.plugins.flake8.enabled": false
      }

Should I just pick one? Are they all similar? There is not a lot of information of this in the documentation and for newbies like me its a bit confusing.

[sperezconesa]

Actually, most of the time it is too slow to work fine... Do I need to have the libraries installed in every kernell?

[krassowski]

Hi @sperezconesa, sorry for the delay in getting back to you. You are doing everything correct with the config (you can chose to have only one or multiple diagnostics sources enabled). In short, flake8, pyflakes and pydocstyle differ in the choices on what is a warning, what is an error and what is not an issue. You can check this Reddit discussion to get a better sense on pyflakes and flake8 differences. If you need further guidance on the configuration of the server, check out the pyls repo, and give them a star to say thank you to the maintainers.

I am sorry that the completion is slow; I feel this pain myself and will be working on it in the coming weeks with a goal to fix it in 2.1 release - subscribes to the releases ("Watch" button on top of the page → "Releases only") to get an update on it. For now I will close this issue as the completion slowness and general slowness are already tracked in #272 and #336.

Please let me know if you have any questions. For very generic questions, you may get a faster response on Stack Overflow, but if you do not get an answer over there, please feel welcome to post a link to a question here.

[sperezconesa]

Thanks a lot! I look forward to ussing it when it is improved!