Python OrderedDict - LRU

from time import time

class TimeBoundedLRU:
    "LRU Cache that invalidates and refreshes old entries."

    def __init__(self, func, maxsize=128, maxage=30):
        self.cache = OrderedDict()      # { args : (timestamp, result)}
        self.func = func
        self.maxsize = maxsize
        self.maxage = maxage

    def __call__(self, *args):
        if args in self.cache:
            self.cache.move_to_end(args)
            timestamp, result = self.cache[args]
            if time() - timestamp <= self.maxage:
                return result
        result = self.func(*args)
        self.cache[args] = time(), result
        if len(self.cache) > self.maxsize:
            self.cache.popitem(0)
        return result

Source: docs.python.org

Similar codes

131 votes270 views6 answers
How to generate random numbers in python
Python
-1 vote240 views1 answer
Python how to find the highest even in a list
Python
0 vote355 views1 answer
Pandas index from 1
Python
0 vote259 views1 answer
Extends template django
Python
3 votes293 views2 answers
Django postgres connection
Python Django
6 votes267 views3 answers
Matplotlib subplots title
Python
1 vote258 views1 answer
How to make a breakable loop in python
Python
0 vote270 views1 answer
Train_test_split from sklearn.selection
Python
1 vote285 views1 answer
Create 2d list dictionary
Python
2 votes259 views1 answer
Remove negative numbers from list python
Python