I have hit this limit when trying to make backups with rdiff-backup (written in Python) on relatives' computers. I found out about UNC paths that way, haven't managed to get rdiff-backup to accept them. Does anyone know how to do that?
"If you have ever needed to work with UNC paths in a Python script for Windows, you might have experienced the same dilemma that we did. What’s the problem? Python has virtually no support for UNC."
http://developer.covenanteyes.com/unc-paths-with-python/
"As tiny as our minority might be, we wanted to deal with these difficulties once and for all. I introduce to you the win_unc library."
These are sometimes erroneously called UNC paths because, well, they _look_ like UNC paths. But UNC paths are used to refer to a path on another host. (In fact, you can specify UNC paths using the Win32 file namespace using the `\\?\UNC\server\resource` mechanism.)
It looks like win_unc will help with UNC, but it looks from a quick glance that it will not help with `\\?\` paths.