To me it seems consistent enough, if I look to PHP, but for inside project more consistency would be better.
I would like underscored_module_names for readability. No UpperCaseModuleNames becouse of different filesystems.
ClassNames are still CamelCase and functionsAndMethods start with lower case letter.
And probably it all makes more sense if we consider that in Python there are lots of C wraps, together with names and influences.
Do you see any major problem there?