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  File "C:\Python27\lib\site-packages\ssdb\client.py", line 398, in ttl
    if isinstance(time, datetime.timedelta):
UnboundLocalError: local variable 'time' referenced before assignment

def ttl(self, name):
        """
        Returns the number of seconds until the key ``name`` will expire.

        Like **Redis.TTL**

        .. note:: ``ttl`` **can only** be used to the `Key/Value`_ .
           
        :param string name: the key name
        :return: the number of seconds, or ``-1`` if the key doesn't
         exist or have no ttl
        :rtype: int

        >>> ssdb.ttl('set_abc')
        6
        >>> ssdb.ttl('not_exist')
        -1
        """
        if isinstance(time, datetime.timedelta):
            time = time.seconds + time.days * 24 * 3600        
        return self.execute_command('expire', name, ttl)

>>> db.zincr('test', 'a', 1)
3
>>> db.zincr('test', 'a', 1)
4
>>> db.zset('test', 'a', 6)
False
>>> db.zdel('test', 'a')
True
>>> db.zset('test', 'a', 6)
True
>>> db.zset('test', 'a', 9)
False
>>> db.zincr('test', 'a', 1)
10
>>> db.zset('test', 'a', 99)
False
>>> db.zget('test', 'a')
99
>>>