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

6 votes222 views2 answers
Python file to array
Python
5 votes178 views1 answer
Last element in list py
Python
3 votes172 views1 answer
Python toast notification
Python
17 votes197 views6 answers
Install flask
Python
0 vote213 views1 answer
Input function in django
Python Django
2 votes191 views2 answers
Python how to get script directory
Python
0 vote173 views1 answer
Python autocorrelation plot
Python
5 votes244 views3 answers
Flask port
Python Flask
2 votes175 views1 answer
Python cv2 get image shape
Python
0 vote177 views1 answer
Python boxplot show mean
Python