Ah, that started to make sense. To be honest I didn't really pay much attention to the _namespace's documentation, I only looked at that of __path__ and somehow expected it to mention that certain namespace won't be a type<list> anymore.

I will re-read your comments and the docs for _namespace; I was also reading this https://www.python.org/dev/peps/pep-0420/#migrating-from-legacy-namespace-packages

Thanks for the help!