Run pip install pyprt in your (virtual) Python environment or conda install -c esri pyprt in a Conda environment. Then use import pyprt in your scripts. We provide wheels and Conda packages for Python ...
ArcGIS CityEngine for Rhino is a plugin for Rhino3D and Grasshopper. It provides a Rhino command and Grasshopper components which enable the execution of CityEngine ‘rules’ within a Rhino scene.