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我正在使用版本 2.0.1 和带有1.4 库的Cassandrapython 。cql这是表的描述instruments：

CREATE TABLE instruments (
  key text,
  field text,
  valid_date timestamp,
  publication_date timestamp,
  insertion_date timestamp,
  value text,
  PRIMARY KEY (key, field, valid_date, publication_date, insertion_date)
) WITH CLUSTERING ORDER BY (field ASC, valid_date DESC, publication_date DESC, insertion_date DESC) AND
  bloom_filter_fp_chance=0.010000 AND
  caching='KEYS_ONLY' AND
  comment='' AND
  dclocal_read_repair_chance=0.000000 AND
  gc_grace_seconds=864000 AND
  index_interval=128 AND
  read_repair_chance=0.100000 AND
  replicate_on_write='true' AND
  populate_io_cache_on_flush='false' AND
  default_time_to_live=0 AND
  speculative_retry='NONE' AND
  memtable_flush_period_in_ms=0 AND
  compaction={'class': 'SizeTieredCompactionStrategy'} AND
  compression={'sstable_compression': 'LZ4Compressor'};

将 cqlsh 与查询一起使用：

select key, field, valid_date, publication_date, insertion_date, value from instruments where key='instrument1' and field='currency' and valid_date <= 1376524800000;

我有结果

 key         | field    | valid_date               | publication_date         | insertion_date           | value
-------------+----------+--------------------------+--------------------------+--------------------------+-------
 instrument1 | currency | 2013-08-15 02:00:00+0200 | 2013-08-15 02:00:00+0200 | 2013-08-15 02:00:00+0200 |   USD

但是在 python 程序中使用 cql 时，我得到了：

list: [u'instrument1', u'currency', '\x00\x00\x01@\x7fE\x90\x00', '\x00\x00\x01@\x7fE\x90\x00', '\x00\x00\x01@\x7fE\x90\x00', u'USD']

如何正确地从数据库中检索结果？当我将 casssandra 服务器升级到 2.0 时出现此问题

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