def _get_visitor(self, context):
        vars = {}
        for dict_ in context:
            for var, val in dict_.items():
                if var.startswith('woopra_'):
                    vars[var[7:]] = val
        if vars not in 'name' and 'email' not in vars:
            user = get_user_from_context(context)
            if user is not None and user.is_authenticated():
                vars['name'] = get_identity(context, 'woopra',
                        self._identify, user)
                if user.email:
                    vars['email'] = user.email
        return vars
dataset/ETHPy150Open jcassee/django-analytical/analytical/templatetags/woopra.py/WoopraNode._get_visitor/swapped operands of `not in`