openmedialibrary/oml/cache.py
2016-01-05 19:36:42 +05:30

25 lines
633 B
Python

import time
class Cache(dict):
def __init__(self, ttl=60):
self._ttl = ttl
self._added = {}
def get(self, key):
if key in self._added:
if self._added[key] < time.time():
del self._added[key]
del self[key]
return
return dict.__getitem__(self, key)
def set(self, key, value, ttl=None):
ttl = ttl or self._ttl
self._added[key] = time.time() + ttl
dict.__setitem__(self, key, value)
def delete(self, key):
if key in self._added:
del self._added[key]
del self[key]