It's not appear in Commands bar

Checklist prior to opening an issue

• [x ] I have followed fully the installation steps laid out in the documentation site.
• [ x] I have restarted jupyterlab.
• [ x] I have read the FAQ section in the documentation site.

Describe the bug A clear and concise description of what the bug is.

Diagnostic commands

• I use conda to install the extension

• 'pip freeze ’ absl-py==0.9.0 alabaster==0.7.12 anaconda-client==1.7.2 anaconda-navigator==1.9.12 anaconda-project==0.8.3 appdirs==1.4.3 argh==0.26.2 asn1crypto @ file:///home/conda/feedstock_root/build_artifacts/asn1crypto_1588618038116/work astor @ file:///home/conda/feedstock_root/build_artifacts/astor_1593610464257/work astroid @ file:///home/conda/feedstock_root/build_artifacts/astroid_1591645081755/work astropy==4.0.1.post1 astunparse==1.6.3 atomicwrites @ file:///home/conda/feedstock_root/build_artifacts/atomicwrites_1588182545583/work attrs==19.3.0 autopep8 @ file:///home/conda/feedstock_root/build_artifacts/autopep8_1591017828430/work Babel==2.8.0 backcall @ file:///home/conda/feedstock_root/build_artifacts/backcall_1592338393461/work backports.functools-lru-cache==1.6.1 backports.shutil-get-terminal-size==1.0.0 backports.tempfile==1.0 backports.weakref==1.0.post1 beautifulsoup4 @ file:///home/conda/feedstock_root/build_artifacts/beautifulsoup4_1589761456552/work bitarray @ file:///home/conda/feedstock_root/build_artifacts/bitarray_1594867913763/work bkcharts==0.2 black==19.10b0 bleach @ file:///home/conda/feedstock_root/build_artifacts/bleach_1588608214987/work blinker==1.4 bokeh @ file:///home/conda/feedstock_root/build_artifacts/bokeh_1592869573618/work boto==2.49.0 Bottleneck==1.3.2 brotlipy==0.7.0 cachetools @ file:///home/conda/feedstock_root/build_artifacts/cachetools_1593420445823/work certifi==2020.6.20 cffi==1.14.0 chardet==3.0.4 click==7.1.2 cloudpickle @ file:///home/conda/feedstock_root/build_artifacts/cloudpickle_1593623337153/work clyent==1.2.2 colorama==0.4.3 conda==4.8.3 conda-build==3.18.11 conda-package-handling==1.6.0 conda-verify==3.4.2 contextlib2==0.6.0.post1 cryptography @ file:///home/conda/feedstock_root/build_artifacts/cryptography_1595348769214/work cycler==0.10.0 Cython @ file:///home/conda/feedstock_root/build_artifacts/cython_1594253470382/work cytoolz==0.10.1 dask @ file:///home/conda/feedstock_root/build_artifacts/dask-core_1595035454217/work decorator==4.4.2 defusedxml==0.6.0 diff-match-patch @ file:///home/conda/feedstock_root/build_artifacts/diff-match-patch_1594679019945/work distributed @ file:///home/conda/feedstock_root/build_artifacts/distributed_1595036503234/work docutils==0.16 entrypoints==0.3 et-xmlfile==1.0.1 fastcache==1.1.0 filelock @ file:///home/conda/feedstock_root/build_artifacts/filelock_1589994591731/work flake8 @ file:///home/conda/feedstock_root/build_artifacts/flake8_1594584774608/work Flask==1.1.2 fsspec @ file:///home/conda/feedstock_root/build_artifacts/fsspec_1589989738418/work future==0.18.2 gast==0.3.3 gevent @ file:///home/conda/feedstock_root/build_artifacts/gevent_1592657467591/work glob2==0.7 gmpy2==2.1.0b1 google-auth @ file:///home/conda/feedstock_root/build_artifacts/google-auth_1595253043732/work google-auth-oauthlib==0.4.1 google-pasta==0.2.0 greenlet @ file:///home/conda/feedstock_root/build_artifacts/greenlet_1591368821264/work grpcio @ file:///home/conda/feedstock_root/build_artifacts/grpcio_1594576798247/work h5py @ file:///home/conda/feedstock_root/build_artifacts/h5py_1595110162077/work HeapDict==1.0.1 html5lib @ file:///home/conda/feedstock_root/build_artifacts/html5lib_1592930327044/work hypothesis @ file:///home/conda/feedstock_root/build_artifacts/hypothesis_1595336243884/work idna @ file:///home/conda/feedstock_root/build_artifacts/idna_1593328102638/work imagecodecs @ file:///home/conda/feedstock_root/build_artifacts/imagecodecs_1593295475914/work imageio @ file:///home/conda/feedstock_root/build_artifacts/imageio_1594044661732/work imagesize==1.2.0 importlib-metadata @ file:///home/conda/feedstock_root/build_artifacts/importlib-metadata_1593211369179/work intervaltree==3.0.2 ipykernel @ file:///home/conda/feedstock_root/build_artifacts/ipykernel_1595101337245/work/dist/ipykernel-5.3.3-py3-none-any.whl ipython @ file:///home/conda/feedstock_root/build_artifacts/ipython_1593235460530/work ipython-genutils==0.2.0 ipywidgets==7.5.1 isort==4.3.21 itsdangerous==1.1.0 jdcal==1.4.1 jedi @ file:///home/conda/feedstock_root/build_artifacts/jedi_1592619900914/work jeepney==0.4.3 Jinja2==2.11.2 joblib @ file:///home/conda/feedstock_root/build_artifacts/joblib_1593624380152/work json5 @ file:///home/conda/feedstock_root/build_artifacts/json5_1591810480056/work jsonschema==3.2.0 jupyter-client @ file:///home/conda/feedstock_root/build_artifacts/jupyter_client_1594732094290/work jupyter-console==6.1.0 jupyter-contrib-core==0.3.3 jupyter-contrib-nbextensions==0.5.1 jupyter-core==4.6.3 jupyter-highlight-selected-word==0.2.0 jupyter-latex-envs==1.4.6 jupyter-nbextensions-configurator @ file:///home/conda/feedstock_root/build_artifacts/jupyter_nbextensions_configurator_1594127094771/work jupyterlab==2.2.0 jupyterlab-code-formatter @ file:///home/conda/feedstock_root/build_artifacts/jupyterlab_code_formatter_1594711437728/work jupyterlab-server @ file:///home/conda/feedstock_root/build_artifacts/jupyterlab_server_1593951277307/work jupyterthemes==0.20.0 Keras-Preprocessing==1.1.0 keyring @ file:///home/conda/feedstock_root/build_artifacts/keyring_1588433935863/work kiwisolver==1.2.0 lazy-object-proxy==1.4.3 lesscpy==0.13.0 libarchive-c==2.9 llvmlite==0.33.0 locket==0.2.0 lxml @ file:///home/conda/feedstock_root/build_artifacts/lxml_1594322698782/work Markdown @ file:///home/conda/feedstock_root/build_artifacts/markdown_1589366472132/work MarkupSafe==1.1.1 matplotlib @ file:///home/conda/feedstock_root/build_artifacts/matplotlib-base_1595353122123/work mccabe==0.6.1 missingno==0.4.2 mistune==0.8.4 mkl-fft==1.1.0 mkl-random==1.1.0 mkl-service==2.3.0 mock @ file:///home/conda/feedstock_root/build_artifacts/mock_1588618847833/work more-itertools @ file:///home/conda/feedstock_root/build_artifacts/more-itertools_1592197792446/work mpmath==1.1.0 msgpack==1.0.0 multipledispatch==0.6.0 mypy-extensions==0.4.3 navigator-updater==0.2.1 nbconvert==5.6.1 nbformat @ file:///home/conda/feedstock_root/build_artifacts/nbformat_1594060262917/work networkx==2.4 nltk==3.4.4 nose==1.3.7 notebook @ file:///home/conda/feedstock_root/build_artifacts/notebook_1594078842924/work numba @ file:///home/conda/feedstock_root/build_artifacts/numba_1594681180710/work numexpr==2.7.1 numpy @ file:///home/conda/feedstock_root/build_artifacts/numpy_1594919729702/work numpydoc @ file:///home/conda/feedstock_root/build_artifacts/numpydoc_1593656006205/work oauthlib==3.0.1 olefile==0.46 openpyxl @ file:///home/conda/feedstock_root/build_artifacts/openpyxl_1593690790606/work opt-einsum==0+untagged.56.g2664021.dirty packaging @ file:///home/conda/feedstock_root/build_artifacts/packaging_1589925210001/work pandas @ file:///home/conda/feedstock_root/build_artifacts/pandas_1592421991297/work pandocfilters==1.4.2 parso==0.7.0 partd==1.1.0 path==13.1.0 pathlib2==2.3.5 pathspec==0.7.0 pathtools==0.1.2 patsy==0.5.1 pep8==1.7.1 pexpect==4.8.0 pickleshare==0.7.5 Pillow @ file:///tmp/build/80754af9/pillow_1594307325547/work pkginfo==1.5.0.1 pluggy @ file:///home/conda/feedstock_root/build_artifacts/pluggy_1592827471208/work ply==3.11 prometheus-client @ file:///home/conda/feedstock_root/build_artifacts/prometheus_client_1590412252446/work prompt-toolkit @ file:///home/conda/feedstock_root/build_artifacts/prompt-toolkit_1592500439797/work protobuf==3.12.3 psutil @ file:///home/conda/feedstock_root/build_artifacts/psutil_1594826921622/work ptyprocess==0.6.0 py @ file:///home/conda/feedstock_root/build_artifacts/py_1593088446458/work pyasn1==0.4.8 pyasn1-modules==0.2.7 pycodestyle @ file:///home/conda/feedstock_root/build_artifacts/pycodestyle_1589305246696/work pycosat==0.6.3 pycparser @ file:///home/conda/feedstock_root/build_artifacts/pycparser_1593275161868/work pycrypto==2.6.1 pycurl==7.43.0.5 pydocstyle==5.0.2 pyflakes==2.2.0 Pygments==2.6.1 PyJWT==1.7.1 pylint @ file:///home/conda/feedstock_root/build_artifacts/pylint_1592404303629/work pyodbc==4.0.30 pyOpenSSL==19.1.0 pyparsing==2.4.7 PyQt5==5.12.3 PyQt5-sip==4.19.18 PyQtChart==5.12 PyQtWebEngine==5.12.1 pyrsistent==0.16.0 PySocks==1.7.1 pytest==5.4.3 pytest-arraydiff==0.3 pytest-astropy==0.7.0 pytest-astropy-header==0.1.2 pytest-doctestplus @ file:///home/conda/feedstock_root/build_artifacts/pytest-doctestplus_1591908454504/work pytest-openfiles @ file:///home/conda/feedstock_root/build_artifacts/pytest-openfiles_1591909410901/work pytest-remotedata==0.3.1 python-dateutil==2.8.1 python-jsonrpc-server @ file:///home/conda/feedstock_root/build_artifacts/python-jsonrpc-server_1588783985962/work python-language-server @ file:///home/conda/feedstock_root/build_artifacts/python-language-server_1593716034648/work pytz==2020.1 PyWavelets==1.1.1 pyxdg==0.26 PyYAML==5.3.1 pyzmq==19.0.1 QDarkStyle==2.8.1 QtAwesome @ file:///home/conda/feedstock_root/build_artifacts/qtawesome_1588715536397/work qtconsole @ file:///home/conda/feedstock_root/build_artifacts/qtconsole_1592845750760/work QtPy==1.9.0 regex @ file:///tmp/build/80754af9/regex_1593435542598/work requests @ file:///home/conda/feedstock_root/build_artifacts/requests_1592425495151/work requests-oauthlib==1.2.0 rope @ file:///home/conda/feedstock_root/build_artifacts/rope_1588950285934/work rsa @ file:///home/conda/feedstock_root/build_artifacts/rsa_1591996208734/work Rtree==0.9.4 ruamel-yaml==0.15.80 scikit-image==0.17.2 scikit-learn @ file:///home/conda/feedstock_root/build_artifacts/scikit-learn_1589920855303/work scipy @ file:///home/conda/feedstock_root/build_artifacts/scipy_1594922069524/work seaborn @ file:///home/conda/feedstock_root/build_artifacts/seaborn-base_1591878760859/work SecretStorage==3.1.2 Send2Trash==1.5.0 simplegeneric==0.8.1 SimpleITK==1.2.4 singledispatch==3.4.0.3 sip==4.19.23 six @ file:///home/conda/feedstock_root/build_artifacts/six_1590081179328/work snowballstemmer==2.0.0 sortedcollections @ file:///home/conda/feedstock_root/build_artifacts/sortedcollections_1591583091437/work sortedcontainers @ file:///home/conda/feedstock_root/build_artifacts/sortedcontainers_1591999956871/work soupsieve @ file:///home/conda/feedstock_root/build_artifacts/soupsieve_1589778966114/work Sphinx @ file:///home/conda/feedstock_root/build_artifacts/sphinx_1593947940626/work sphinxcontrib-applehelp==1.0.2 sphinxcontrib-devhelp==1.0.2 sphinxcontrib-htmlhelp==1.0.3 sphinxcontrib-jsmath==1.0.1 sphinxcontrib-qthelp==1.0.3 sphinxcontrib-serializinghtml==1.1.4 sphinxcontrib-websupport @ file:///home/conda/feedstock_root/build_artifacts/sphinxcontrib-websupport_1593344032344/work spyder @ file:///home/conda/feedstock_root/build_artifacts/spyder_1594414158390/work spyder-kernels @ file:///home/conda/feedstock_root/build_artifacts/spyder-kernels_1594391899845/work SQLAlchemy @ file:///home/conda/feedstock_root/build_artifacts/sqlalchemy_1593116989295/work statsmodels @ file:///home/conda/feedstock_root/build_artifacts/statsmodels_1591963256838/work sympy @ file:///home/conda/feedstock_root/build_artifacts/sympy_1593716797971/work tables==3.6.1 tblib==1.6.0 tensorboard @ file:///home/conda/feedstock_root/build_artifacts/tensorboard_1592820219624/work/tensorboard-2.2.2-py3-none-any.whl tensorboard-plugin-wit @ file:///home/conda/feedstock_root/build_artifacts/tensorboard-plugin-wit_1592816951245/work/tensorboard_plugin_wit-1.6.0.post3-py3-none-any.whl tensorflow==2.2.0 tensorflow-estimator @ file:///home/conda/feedstock_root/build_artifacts/tensorflow-estimator_1592819788686/work/tensorflow_estimator-2.2.0-py2.py3-none-any.whl termcolor==1.1.0 terminado==0.8.3 testpath==0.4.4 threadpoolctl @ file:///tmp/tmp79xdzxkt/threadpoolctl-2.1.0-py3-none-any.whl tifffile @ file:///home/conda/feedstock_root/build_artifacts/tifffile_1595072593978/work toml @ file:///home/conda/feedstock_root/build_artifacts/toml_1589469402899/work toolz==0.10.0 tornado==6.0.4 tqdm @ file:///home/conda/feedstock_root/build_artifacts/tqdm_1594937875116/work traitlets==4.3.3 typed-ast==1.4.1 typing-extensions @ file:///home/conda/feedstock_root/build_artifacts/typing_extensions_1588470653596/work ujson==1.35 unicodecsv==0.14.1 urllib3==1.25.9 watchdog @ file:///home/conda/feedstock_root/build_artifacts/watchdog_1593120501703/work wcwidth @ file:///home/conda/feedstock_root/build_artifacts/wcwidth_1592931742287/work webencodings==0.5.1 Werkzeug==1.0.1 widgetsnbextension @ file:///home/conda/feedstock_root/build_artifacts/widgetsnbextension_1594164347302/work wrapt==1.11.2 wurlitzer==2.0.0 xgboost==1.1.1 xlrd==1.2.0 XlsxWriter @ file:///home/conda/feedstock_root/build_artifacts/xlsxwriter_1590799523302/work xlwt==1.3.0 xmltodict==0.12.0 yapf==0.29.0 zict==2.0.0 zipp==3.1.0 zope.event @ file:///home/conda/feedstock_root/build_artifacts/zope.event_1591372894284/work zope.interface==5.1.0

• jupyter labextension list

JupyterLab v2.2.0 Known labextensions: app dir: /home/derick/anaconda3/share/jupyter/lab @aquirdturtle/collapsible_headings v2.2.0 enabled OK @jupyterlab/toc v4.0.0 enabled OK @krassowski/jupyterlab-lsp v1.1.0 enabled OK @lckr/jupyterlab_variableinspector v0.5.1 enabled OK @ryantam626/jupyterlab_code_formatter v1.3.4 enabled OK jupyterlab-drawio v0.7.0 enabled OK jupyterlab-execute-time v1.0.0 enabled OK

I am in the version v1.3.4 because the jupyterlab accused a mismatch version with the 1.3.5. I already tried version 1.3.5

• jupyter serverextension list

jupyter_nbextensions_configurator enabled - Validating… jupyter_nbextensions_configurator 0.4.1 OK jupyterlab_code_formatter enabled - Validating… jupyterlab_code_formatter OK config dir: /home/derick/anaconda3/etc/jupyter jupyterlab enabled - Validating… jupyterlab 2.2.0 OK jupyter_nbextensions_configurator enabled - Validating… jupyter_nbextensions_configurator 0.4.1 OK jupyterlab_code_formatter enabled - Validating… jupyterlab_code_formatter OK

• Photos

[ryantam626]

Try follow this https://github.com/ryantam626/jupyterlab_code_formatter/issues/119

[ryantam626]

Nice!