What followed was the realization that writing a FUSE filesystem, particularly in Python, isn’t as complicated ... We had success using [Stavros’] example script on Linux and OSX.

Template strings, deferred annotations, better error messages, and a new debugger interface are among the goodies in Python 3 ...

Python’s new template strings, or t-strings, give you a much more powerful way to format data than the old-fashioned f-strings.