The app doesn't start.

[Fernando Silva Maransatto]

Every time I try to open the app, it doesn't open. I tried to run "variety slideshow", but then the following error was shown.

I'm using Ubuntu 16.04

/usr/lib/python2.7/dist-packages/variety/__init__.py:105: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded.
  from gi.repository import Gtk, Gdk, GObject # pylint: disable=E0611
Traceback (most recent call last):
  File "/usr/bin/variety", line 38, in <module>
    import variety
  File "/usr/lib/python2.7/dist-packages/variety/__init__.py", line 107, in <module>
    from variety import VarietyWindow
  File "/usr/lib/python2.7/dist-packages/variety/VarietyWindow.py", line 22, in <module>
    from variety.FacebookHelper import FacebookHelper
  File "/usr/lib/python2.7/dist-packages/variety/FacebookHelper.py", line 55, in <module>
    from variety.Util import Util
  File "/usr/lib/python2.7/dist-packages/variety/Util.py", line 16, in <module>
    import bs4
  File "/usr/lib/python2.7/dist-packages/bs4/__init__.py", line 30, in <module>
    from .builder import builder_registry, ParserRejectedMarkup
  File "/usr/lib/python2.7/dist-packages/bs4/builder/__init__.py", line 314, in <module>
    from . import _html5lib
  File "/usr/lib/python2.7/dist-packages/bs4/builder/_html5lib.py", line 70, in <module>
    class TreeBuilderForHtml5lib(html5lib.treebuilders._base.TreeBuilder):
AttributeError: 'module' object has no attribute '_base'
maransatto@NoteMaransatto:~$ gi.require_version('Gtk', '3.0')
bash: syntax error near unexpected token `'Gtk',