nk$ npm run build:py                                                         

> my-dash-component@0.0.1 build:py /Users/nicolas/plotly/dash-component-boilerplate
> node ./extract-meta src/lib/components > my_dash_component/metadata.json && copyfiles package.json my_dash_component && python -c "import dash; dash.development.component_loader.generate_classes('my_dash_component', 'my_dash_component/metadata.json')"

Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named dash