| 123456789101112131415161718192021222324252627282930313233 | from contextlib import contextmanagertry:    import hiredis    HIREDIS_AVAILABLE = Trueexcept ImportError:    HIREDIS_AVAILABLE = Falsedef from_url(url, db=None, **kwargs):    """    Returns an active Redis client generated from the given database URL.    Will attempt to extract the database id from the path url fragment, if    none is provided.    """    from redis.client import Redis    return Redis.from_url(url, db, **kwargs)@contextmanagerdef pipeline(redis_obj):    p = redis_obj.pipeline()    yield p    p.execute()class dummy(object):    """    Instances of this class can be used as an attribute container.    """    pass
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