Cannot import name six Django-CMS
You should have Django version >=1.4.5. It worked for me.
Am Using django 1.3 and django-cms 2.2 and when i run i get an error as follows:

django.template.base.TemplateSyntaxError: 'cms_tags' is not a valid tag library: ImportError raised loading cms.templatetags.cms_tags: cannot import name six