Unity Tweak Tool crashes with ImportError: No module named 'xdg.BaseDirectory'; 'xdg' is not a package

[Dan Darie]

Unity Tweak Tool crashes on start:

Traceback (most recent call last):
  File "./unity-tweak-tool", line 33, in <module>
    import UnityTweakTool
  File "/home/dan/unity-tweak-tool/UnityTweakTool/__init__.py", line 46, in <module>
    from UnityTweakTool.config.logging import LOGFILE,LOGFMT,LOGLVL,CACHEDIR
  File "/home/dan/unity-tweak-tool/UnityTweakTool/config/logging.py", line 35, in <module>
    import xdg.BaseDirectory
ImportError: No module named 'xdg.BaseDirectory'; 'xdg' is not a package

OS: Ubuntu 16.10
Kernel: 4.10.0-041000rc5-generic

unity-tweak-tool/yakkety,yakkety,now 0.0.7ubuntu2 all [installed]
python/yakkety,now 2.7.11-2 amd64 [installed,automatic]
python3/yakkety,now 3.5.1-4 amd64 [installed]
python-xdg/yakkety,yakkety,now 0.25-4 all [installed]
python3-xdg/yakkety,yakkety,now 0.25-4 all [installed]

[Rico Tiongson (hikari9)]

Having a similar problem on Ubuntu 16.04 LTS. The module "UnityTweakTool" being missing seems to be the problem, even after reinstall. Here is my traceback:

$ unity-tweak-tool

Traceback (most recent call last):
  File "/usr/bin/unity-tweak-tool", line 33, in <module>
    import UnityTweakTool
ImportError: No module named UnityTweakTool