mau_mau_bot/mwt.py
2017-08-19 00:08:55 +02:00

41 lines
No EOL
1.2 KiB
Python

#!/usr/bin/env python
# Source: http://code.activestate.com/recipes/325905-memoize-decorator-with-timeout/#c1
import time
class MWT(object):
"""Memoize With Timeout"""
_caches = {}
_timeouts = {}
def __init__(self,timeout=2):
self.timeout = timeout
def collect(self):
"""Clear cache of results which have timed out"""
for func in self._caches:
cache = {}
for key in self._caches[func]:
if (time.time() - self._caches[func][key][1]) < self._timeouts[func]:
cache[key] = self._caches[func][key]
self._caches[func] = cache
def __call__(self, f):
self.cache = self._caches[f] = {}
self._timeouts[f] = self.timeout
def func(*args, **kwargs):
kw = sorted(kwargs.items())
key = (args, tuple(kw))
try:
v = self.cache[key]
print("cache")
if (time.time() - v[1]) > self.timeout:
raise KeyError
except KeyError:
print("new")
v = self.cache[key] = f(*args,**kwargs),time.time()
return v[0]
func.func_name = f.__name__
return func