brief overview

opendata.swiss is a portal to access opendata from the various levels of the Swiss political levels and their respective public administrations.
Whereas in the last years the legal basis merely was a strategic paper by the Swiss executive branch, the Federal Council, a law is in the workings at the moment. Many Cantons and some municipalities are working on their own laws to make their data available to the public.
For a more detailed overview of the current situation, have a look at rnckp's list.
Examples and use cases on How to use the API from opendata.swiss can be found on Github.

Using python-scripts to fetch the data via the opendata.swiss"' API

The bokeh-module is used to generate an interactive visualization of how opendata.swiss was joined by organizations to publish their OGD.
Bokeh is fantastic for creating interactive visualizations - however the generated html-file used for the iframe can become quite large. Visualizations become very demanding of RAM and not suitable for a simple webpage such as this one. Therefore, for larger data such as the growth of packages on opendata.swiss, the plot is visualized with matplotlib.

Autogenerated Report - script: here

Visualization of Organisations Growth on opendata.swiss made with bokeh.

Visualization of Package Growth on opendata.swiss