This is the fading_ui-write-a-block package meant as a guide to building out-of-tree packages. To use the fading_ui blocks, the Python namespaces is in 'fading_ui', which is imported as: import fading_ui See the Doxygen documentation for details about the blocks available in this package. A quick listing of the details can be found in Python after importing by using: help(fading_ui)