Fixed secondary_menu.py : 'odict_values' object does not support indexing

.travis.yml

@@ -1,9 +1,10 @@
 language: python
-
+      
 python:
   - 2.7
   - 3.4
   - 3.5
+  - 3.6
 
 env:
   matrix:
@@ -18,7 +19,10 @@ before_script:
   - sh -e /etc/init.d/xvfb start
   - "if [[ $TRAVIS_PYTHON_VERSION == '2.7' ]]; then export PYVER=py27; fi"
   - "if [[ $TRAVIS_PYTHON_VERSION == '3.4' ]]; then export PYVER=py34; fi"
-  - "if [[ $TRAVIS_PYTHON_VERSION == '3.5' ]]; then export PYVER=py35; fi"
+  - "if [[ $TRAVIS_PYTHON_VERSION == '3.5' ]]; then export PYVER=py35; fi"  
+  - "if [[ $TRAVIS_PYTHON_VERSION == '3.6' ]]; then export PYVER=py36; fi"
+
+
 
 script:
   - tox -e"$PYVER-$DJANGO-$CMS"

cmsplugin_cascade/bootstrap3/secondary_menu.py

@@ -39,7 +39,7 @@ def get_form(self, request, obj=None, **kwargs):
         for page in Page.objects.filter(reverse_id__isnull=False).order_by('publisher_is_draft'):
             if page.reverse_id not in choices:
                 choices[page.reverse_id] = page.get_title(lang)
-        self.glossary_fields[0].widget.choices = choices.items()
+        next(iter(self.glossary_fields)).widget.choices = list(choices.items())
         return super(BootstrapSecondaryMenuPlugin, self).get_form(request, obj, **kwargs)
 
 plugin_pool.register_plugin(BootstrapSecondaryMenuPlugin)