A "how this differs from PEP8" summary would be useful to me, assuming it differs.
Google (original formatting):
BE CONSISTENT.
PEP8: A Foolish Consistency is the Hobgoblin of Little MindsThe quote from PEP8 translates in my mind to "be consistent if it's worth it".
These policies are not orthogonal. You can't satisfy both in all cases.
This style guide looks like a superset of PEP 8 -- where PEP 8 describes what Python code should look like, this guide goes through every Python feature and lays out exactly where a sizable group of top-notch Python hackers were willing to draw the line on maintainability vs. whipupitude for large, long-running projects.