def has(self, key):
        filename = self._get_filename(key)
        try:
            with open(filename, 'rb') as f:
                pickle_time = pickle.load(f)
                if pickle_time == 0 or pickle_time >= time():
                    return True
                else:
                    os.remove(filename)
                    return False
        except (__HOLE__, OSError, pickle.PickleError):
            return False
dataset/ETHPy150Open GoogleCloudPlatform/appengine-flask-skeleton/lib/werkzeug/contrib/cache.py/FileSystemCache.has