Speaking of PEP8, I find it strange that the guide mentions "Indent your code blocks with 4 spaces.". AFAIK Google used 2 spaces for indentation.
I'm pretty sure these are the coding standards for code released outside of Google. For various disgusting historical reasons Python written internally spits in the face of PEP8 naming conventions. (And other weird niggles.)
Note that this differs from PEP8 and instead follows the original Google Python Style guide from which this style guide originated.
Indent your code blocks with 2 spaces.