@classmethod
    def unquote(cls, value):
        try:
            if cls.quote_base64:
                value = base64.b64decode(value)
            if cls.serialization_method is not None:
                value = cls.serialization_method.loads(value)
            return value
        except Exception:
            # unfortunately pickle and other serialization modules can
            # cause pretty every error here.  if we get one we catch it
            # and convert it into an UnquoteError
            raise UnquoteError()
Unquote the value for the cookie.  If unquoting does not work a
dataset/ETHPy150Open GoogleCloudPlatform/appengine-flask-skeleton/lib/werkzeug/contrib/securecookie.py/SecureCookie.unquote