vtkPolyData.ipynb example doesn't work in Jupyter Lab

The example at https://github.com/InsightSoftwareConsortium/itkwidgets/blob/master/examples/vtkPolyData.ipynb doesn’t seem to actually bring up the widget in Jupyter Lab.

For reference here is my environment:

$ conda create -n sw python vtk matplotlib jupyterlab itkwidget
s                                                                                   
Collecting package metadata (current_repodata.json): done
Solving environment: done

## Package Plan ##

  environment location: /home/scopatz/miniconda/envs/sw

  added / updated specs:
    - itkwidgets
    - jupyterlab
    - matplotlib
    - python
    - vtk


The following NEW packages will be INSTALLED:

  _libgcc_mutex      conda-forge/linux-64::_libgcc_mutex-0.1-conda_forge
  _openmp_mutex      conda-forge/linux-64::_openmp_mutex-4.5-1_llvm
  attrs              conda-forge/noarch::attrs-19.3.0-py_0
  backcall           conda-forge/noarch::backcall-0.1.0-py_0
  bleach             conda-forge/noarch::bleach-3.1.4-pyh9f0ad1d_0
  bzip2              conda-forge/linux-64::bzip2-1.0.8-h516909a_2
  ca-certificates    conda-forge/linux-64::ca-certificates-2019.11.28-hecc5488_0
  certifi            conda-forge/linux-64::certifi-2019.11.28-py38h32f6830_1
  cffi               conda-forge/linux-64::cffi-1.14.0-py38hd463f26_0
  chardet            conda-forge/linux-64::chardet-3.0.4-py38h32f6830_1006
  colorcet           conda-forge/noarch::colorcet-2.0.1-py_0
  cryptography       conda-forge/linux-64::cryptography-2.8-py38h766eaa4_2
  curl               conda-forge/linux-64::curl-7.68.0-hf8cf82a_0
  cycler             conda-forge/noarch::cycler-0.10.0-py_2
  dbus               conda-forge/linux-64::dbus-1.13.6-he372182_0
  decorator          conda-forge/noarch::decorator-4.4.2-py_0
  defusedxml         conda-forge/noarch::defusedxml-0.6.0-py_0
  entrypoints        conda-forge/linux-64::entrypoints-0.3-py38h32f6830_1001
  expat              conda-forge/linux-64::expat-2.2.9-he1b5a44_2
  fontconfig         conda-forge/linux-64::fontconfig-2.13.1-h86ecdb6_1001
  freetype           conda-forge/linux-64::freetype-2.10.1-he06d7ca_0
  future             conda-forge/linux-64::future-0.18.2-py38h32f6830_1
  gettext            conda-forge/linux-64::gettext-0.19.8.1-hc5be6a0_1002
  glib               conda-forge/linux-64::glib-2.58.3-py38h73cb85d_1003
  gst-plugins-base   conda-forge/linux-64::gst-plugins-base-1.14.5-h0935bb2_2
  gstreamer          conda-forge/linux-64::gstreamer-1.14.5-h36ae1b5_2
  hdf4               conda-forge/linux-64::hdf4-4.2.13-hf30be14_1003
  hdf5               conda-forge/linux-64::hdf5-1.10.5-nompi_h3c11f04_1104
  icu                conda-forge/linux-64::icu-64.2-he1b5a44_1
  idna               conda-forge/noarch::idna-2.9-py_1
  importlib-metadata conda-forge/linux-64::importlib-metadata-1.5.2-py38h32f6830_0
  importlib_metadata conda-forge/noarch::importlib_metadata-1.5.2-0
  ipydatawidgets     conda-forge/noarch::ipydatawidgets-4.0.1-py_0
  ipykernel          conda-forge/linux-64::ipykernel-5.2.0-py38h23f93f0_1
  ipympl             conda-forge/noarch::ipympl-0.5.6-pyh8c360ce_0
  ipyscales          conda-forge/noarch::ipyscales-0.4.0-py_1
  ipython            conda-forge/linux-64::ipython-7.13.0-py38h32f6830_2
  ipython_genutils   conda-forge/noarch::ipython_genutils-0.2.0-py_1
  ipywidgets         conda-forge/noarch::ipywidgets-7.5.1-py_0
  itk                conda-forge/linux-64::itk-5.0.1-py38_1
  itkwidgets         conda-forge/linux-64::itkwidgets-0.26.1-py38h32f6830_0
  jedi               conda-forge/linux-64::jedi-0.16.0-py38h32f6830_1
  jinja2             conda-forge/noarch::jinja2-2.11.1-py_0
  jpeg               conda-forge/linux-64::jpeg-9c-h14c3975_1001
  json5              conda-forge/noarch::json5-0.9.0-py_0
  jsoncpp            conda-forge/linux-64::jsoncpp-1.8.4-hc9558a2_1002
  jsonschema         conda-forge/linux-64::jsonschema-3.2.0-py38h32f6830_1
  jupyter_client     conda-forge/noarch::jupyter_client-6.1.2-py_0
  jupyter_core       conda-forge/linux-64::jupyter_core-4.6.3-py38h32f6830_1
  jupyterlab         conda-forge/noarch::jupyterlab-2.0.1-py_0
  jupyterlab_server  conda-forge/noarch::jupyterlab_server-1.0.7-py_0
  kiwisolver         conda-forge/linux-64::kiwisolver-1.1.0-py38hbf85e49_1
  krb5               conda-forge/linux-64::krb5-1.16.4-h2fd8d38_0
  ld_impl_linux-64   conda-forge/linux-64::ld_impl_linux-64-2.34-h53a641e_0
  libblas            conda-forge/linux-64::libblas-3.8.0-16_openblas
  libcblas           conda-forge/linux-64::libcblas-3.8.0-16_openblas
  libclang           conda-forge/linux-64::libclang-9.0.1-default_hde54327_0
  libcurl            conda-forge/linux-64::libcurl-7.68.0-hda55be3_0
  libedit            conda-forge/linux-64::libedit-3.1.20170329-hf8c457e_1001
  libffi             conda-forge/linux-64::libffi-3.2.1-he1b5a44_1007
  libgcc-ng          conda-forge/linux-64::libgcc-ng-9.2.0-h24d8f2e_2
  libgfortran-ng     conda-forge/linux-64::libgfortran-ng-7.3.0-hdf63c60_5
  libiconv           conda-forge/linux-64::libiconv-1.15-h516909a_1006
  liblapack          conda-forge/linux-64::liblapack-3.8.0-16_openblas
  libllvm9           conda-forge/linux-64::libllvm9-9.0.1-hc9558a2_0
  libnetcdf          conda-forge/linux-64::libnetcdf-4.7.3-nompi_h9f9fd6a_101
  libopenblas        conda-forge/linux-64::libopenblas-0.3.9-h5ec1e0e_0
  libpng             conda-forge/linux-64::libpng-1.6.37-hed695b0_1
  libsodium          conda-forge/linux-64::libsodium-1.0.17-h516909a_0
  libssh2            conda-forge/linux-64::libssh2-1.8.2-h22169c7_2
  libstdcxx-ng       conda-forge/linux-64::libstdcxx-ng-9.2.0-hdf63c60_2
  libtiff            conda-forge/linux-64::libtiff-4.1.0-hc7e4089_6
  libuuid            conda-forge/linux-64::libuuid-2.32.1-h14c3975_1000
  libwebp-base       conda-forge/linux-64::libwebp-base-1.1.0-h516909a_3
  libxcb             conda-forge/linux-64::libxcb-1.13-h14c3975_1002
  libxkbcommon       conda-forge/linux-64::libxkbcommon-0.10.0-he1b5a44_0
  libxml2            conda-forge/linux-64::libxml2-2.9.10-hee79883_0
  llvm-openmp        conda-forge/linux-64::llvm-openmp-9.0.1-hc9558a2_2
  lz4-c              conda-forge/linux-64::lz4-c-1.8.3-he1b5a44_1001
  markupsafe         conda-forge/linux-64::markupsafe-1.1.1-py38h1e0a361_1
  matplotlib         conda-forge/linux-64::matplotlib-3.2.1-0
  matplotlib-base    conda-forge/linux-64::matplotlib-base-3.2.1-py38h2af1d28_0
  mistune            conda-forge/linux-64::mistune-0.8.4-py38h516909a_1000
  nbconvert          conda-forge/linux-64::nbconvert-5.6.1-py38_0
  nbformat           conda-forge/noarch::nbformat-5.0.4-py_0
  ncurses            conda-forge/linux-64::ncurses-6.1-hf484d3e_1002
  notebook           conda-forge/linux-64::notebook-6.0.3-py38_0
  nspr               conda-forge/linux-64::nspr-4.25-he1b5a44_0
  nss                conda-forge/linux-64::nss-3.47-he751ad9_0
  numpy              conda-forge/linux-64::numpy-1.18.1-py38h8854b6b_1
  openssl            conda-forge/linux-64::openssl-1.1.1e-h516909a_0
  pandoc             conda-forge/linux-64::pandoc-2.9.2-0
  pandocfilters      conda-forge/noarch::pandocfilters-1.4.2-py_1
  param              conda-forge/noarch::param-1.9.3-py_0
  parso              conda-forge/noarch::parso-0.6.2-py_0
  pcre               conda-forge/linux-64::pcre-8.44-he1b5a44_0
  pexpect            conda-forge/linux-64::pexpect-4.8.0-py38h32f6830_1
  pickleshare        conda-forge/linux-64::pickleshare-0.7.5-py38h32f6830_1001
  pip                conda-forge/noarch::pip-20.0.2-py_2
  prometheus_client  conda-forge/noarch::prometheus_client-0.7.1-py_0
  prompt-toolkit     conda-forge/noarch::prompt-toolkit-3.0.5-py_0
  pthread-stubs      conda-forge/linux-64::pthread-stubs-0.4-h14c3975_1001
  ptyprocess         conda-forge/noarch::ptyprocess-0.6.0-py_1001
  pycparser          conda-forge/noarch::pycparser-2.20-py_0
  pyct               conda-forge/noarch::pyct-0.4.6-py_0
  pyct-core          conda-forge/noarch::pyct-core-0.4.6-py_0
  pygments           conda-forge/noarch::pygments-2.6.1-py_0
  pyopenssl          conda-forge/noarch::pyopenssl-19.1.0-py_1
  pyparsing          conda-forge/noarch::pyparsing-2.4.6-py_0
  pyqt               conda-forge/linux-64::pyqt-5.12.3-py38hcca6a23_1
  pyrsistent         conda-forge/linux-64::pyrsistent-0.16.0-py38h1e0a361_0
  pysocks            conda-forge/linux-64::pysocks-1.7.1-py38h32f6830_1
  python             conda-forge/linux-64::python-3.8.2-h8356626_5_cpython
  python-dateutil    conda-forge/noarch::python-dateutil-2.8.1-py_0
  python_abi         conda-forge/linux-64::python_abi-3.8-1_cp38
  pyyaml             conda-forge/linux-64::pyyaml-5.3.1-py38h1e0a361_0
  pyzmq              conda-forge/linux-64::pyzmq-19.0.0-py38ha71036d_1
  qt                 conda-forge/linux-64::qt-5.12.5-hd8c4c69_1
  readline           conda-forge/linux-64::readline-8.0-hf8c457e_0
  requests           conda-forge/noarch::requests-2.23.0-pyh8c360ce_2
  scipy              conda-forge/linux-64::scipy-1.4.1-py38h921218d_0
  send2trash         conda-forge/noarch::send2trash-1.5.0-py_0
  setuptools         conda-forge/linux-64::setuptools-46.1.3-py38h32f6830_0
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  tbb                conda-forge/linux-64::tbb-2020.1-hc9558a2_0
  terminado          conda-forge/linux-64::terminado-0.8.3-py38h32f6830_1
  testpath           conda-forge/noarch::testpath-0.4.4-py_0
  tk                 conda-forge/linux-64::tk-8.6.10-hed695b0_0
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  traitlets          conda-forge/linux-64::traitlets-4.3.3-py38h32f6830_1
  traittypes         conda-forge/noarch::traittypes-0.2.1-py_1
  urllib3            conda-forge/linux-64::urllib3-1.25.7-py38h32f6830_1
  vtk                conda-forge/linux-64::vtk-8.2.0-py38h1e82295_210
  wcwidth            conda-forge/noarch::wcwidth-0.1.9-pyh9f0ad1d_0
  webencodings       conda-forge/noarch::webencodings-0.5.1-py_1
  wheel              conda-forge/noarch::wheel-0.34.2-py_1
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  zstandard          conda-forge/linux-64::zstandard-0.13.0-py38he1b5a44_0
  zstd               conda-forge/linux-64::zstd-1.4.4-h3b9ef0a_2


Preparing transaction: done
Verifying transaction: done
Executing transaction: - b'Enabling notebook extension jupyter-js-widgets/extension...\n      - Validating: \x1b[32mOK\x1b[0m\n'
done
#
# To activate this environment, use
#
#     $ conda activate sw
#
# To deactivate an active environment, use
#
#     $ conda deactivate

[tassos]

Ok… my bad. I mistyped the argument name in the view call. It should have been:

view(geometries=cone)

instead of

view(geometry=cone)

Funny how you only notice these stuff after you open an issue (I’ve been struggling with this for a couple of days…)

[tassos]

I opened a new issue, and then noticed there is a very similar problem mentioned here. What was the conclusion eventually?

I am trying to run the example on vtkPolyData, and I am getting a widget with a blank output. I tried zooming in/out, but I do not see anything rendered in the window (you can see the input code and output bellow)

The first part of the example with the bunny is working fine.

I am using Jupyter Lab (2.2.8) and have install itkwidgets (0.32.0) through pip and the jupyter extension through jupyter lab extension manager. Vtk is also installed through pip (9.0.1)

Is there something I am doing wrong?