function zfilter is not usable for datetime type

[zhangdong046]

1048 for i in self.db.zrange(self.key, 0, -1):
1049 print i, self.db.zscore(self.key, i)
1050 print self.key, min, max
1051 return self.db.zrangebyscore(self.key, min, max, **kwargs)

The key and the score:
1471795200.000000 1.0
1471536000.000000 2.0
The min and max for float datetime:
BBSRecord:post_date 1471708800.0 1472313599.0

[zhangdong046]

bug --> 653 pipeline.zadd(zindex, score, self.id)

[zhangdong046]

43 #client = Client()
44 #connection = client.redis()
<-- bug