Voila apps

Environment requirements

Your conda environment (used in JHub Apps Launcher’s App creation form) must have the following packages for successful app deployment:

jhsingle-native-proxy >= 0.8.2
voila >= 0.5.6
Other libraries used in the app

Example application

To deploy the Voila Basic Example using JHub Apps, you can use the following code and environment:

Code (Jupyter Notebook)

In a Jupyter Notebook, copy the following lines of code into a cell.

import ipywidgets as widgets

slider = widgets.FloatSlider(description='x')
text = widgets.FloatText(disabled=True, description='x^2')

def compute(*ignore):
    text.value = str(slider.value ** 2)

slider.observe(compute, 'value')

slider.value = 4

widgets.VBox([slider, text])

You will see a basic slider app as shown in this screenshot:

Simple interactive Voilà app displaying a slider for variable x and its squared value

Environment specification

Use the following spec to create a Conda environment wherever JHub Apps is deployed. If using Nebari, use this spec to create an environment with conda-store.

channels:
  - conda-forge
dependencies:
  - ipywidgets
  - jhsingle-native-proxy>=0.8.2
  - pandas
  - python
  - pip
  - pip:
      - voila==0.5.6
  - ipykernel

Next steps

✨ Launch app →