With installed Python with pywin32 installed: ====================================================================== ERROR: test_netbios_getnode (test.test_uuid.TestInternals) ---------------------------------------------------------------------- Traceback (most recent call last): File "C:\Python34\lib\test\test_uuid.py", line 479, in test_netbios_getnode node = uuid._netbios_getnode() File "C:\Python34\lib\uuid.py", line 432, in _netbios_getnode adapters._pack() File "C:\Python34\lib\site-packages\win32\lib\netbios.py", line 219, in _pack self._buffer_[:] = struct.pack(*(self._format,) + tuple(vals)) struct.error: argument for 's' must be a bytes object Assumed to affect all 3.x versions, but only confirmed on 3.4.
Still fails on Python 3.6.1 with pypiwin32-220; those are the versions I have handy to check on. I've not managed to report it to pywin32 or look into it any deeper, though. If someone can confirm that it's definitely their bug, this can be closed as third-party.