Added documentation of global variables and example code

This example makes use of the updated global "dunder" variables
updated in #7121
Merge pull request #7180 from micahhausler/document/py_renderer

Added documentation of global variables and example code
Typo in loader.py
Merge pull request #7181 from holmboe/patch-1

Typo in loader.py
Type in cloud_controller.rst
Merge pull request #7182 from holmboe/patch-1

Type in cloud_controller.rst