def load_data(self):
        try:
            data = self.request.get_signed_cookie(self.prefix)
        except __HOLE__:
            data = None
        except BadSignature:
            raise SuspiciousOperation('WizardView cookie manipulated')
        if data is None:
            return None
        return json.loads(data, cls=json.JSONDecoder)
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/django/contrib/formtools/wizard/storage/cookie.py/CookieStorage.load_data