An excellent reference for instruction names is the documentation site by RealSense developer UnaNancyOwen, which draws information directly from the official docs and arranges it into a more easily searchable format.
A good search technique when looking for very technical details is to start each search with the word 'librealsense' - e.g 'librealsense laser power python', as this is likely to pull the very technical RealSense GitHub site's content into the search results. Below is a search result related to accessing laser power in Python:
You can also find some Python tutorials published by Intel here:
The first link in the list of Python tutorials is about post-processing filters, the second is about using RealSense underwater, and the third is about calculating the distance of an object.