When you add a TarInfo object created directly in memory, for example from a byte string, there is no debug logging available.  `tarfile.add()` logs the name of each file added when debug level is 1 or higher.  I think it would be a good idea to do the same for `tarfile.addfile()`, perhaps with a higher debug level.  It looks like debug=3 is currently unused, even though it's defined in the documentation.