expire_ordered_set

eoset support full set api. This structure can remember item insert order, and offer expire support for single item.
Besides, eoset realize some interface which like handle list such as __getitem__, __reversed__ and another pop method pop_last.

expire method return value

• 0 : key not exist
• 1 : set timeout successfully

ttl method return value

• -2 : key not exist
• -1 : key exist and never expire

e.g.

python -i eoset.py

and then

>>> item = eoset('jljfsdfadf')
>>> reversed(item)
<listreverseiterator at 0x101fa3710>
>>> item[3]
's'
>>> item.pop()
'j'
>>> item.pop_last()
'a'
>>> item
ExpireOrderSet(['l', 'f', 's', 'd'])
>>> item.expires(50)
>>> item.ttls()
[('d', '43.6890'), ('s', '43.6890'), ('l', '43.6890'), ('f', '43.6890')]
>>> item.expire('d', 20)
1
>>> item.ttl('d')
'15.5761'
>>> time.sleep(16)
>>> item.ttl('d')
-2