It raises a keyerror if not installed.

Author: matham

kivy_garden/filebrowser/__init__.py

@@ -61,7 +61,7 @@ def _fbrowser_submit(self, instance):
 try:
     from kivy.garden.filechooserthumbview import FileChooserThumbView as \
         IconView
-except ImportError:
+except (ImportError, KeyError):
     from kivy.uix.filechooser import FileChooserIconView as IconView
 from kivy.properties import (ObjectProperty, StringProperty, OptionProperty,
                              ListProperty, BooleanProperty)