def __init__(self, context, undefined_str):
    self.stack = [_Frame(context)]
    self.undefined_str = undefined_str
Get the key to a redis set of filenames for a package
dataset/ETHPy150Open cloudbuilders/radioedit/jsontemplate.py/_ScopedContext.__init__--crossover with--dataset/ETHPy150Open mathcamp/pypicloud/pypicloud/cache/redis_cache.py/RedisCache.redis_filename_set