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

0 vote359 views1 answer
Python geodata visualize
Python
1 vote318 views2 answers
Number of digits calculation
Python
2 votes348 views2 answers
Python sort file names with numbers
Python
0 vote392 views1 answer
Gevent with flask
Python Flask
0 vote341 views1 answer
Sklean tfidf
Python
4 votes359 views2 answers
Python read array line by line
Python
0 vote328 views1 answer
Redirect a post request django
Python
0 vote350 views1 answer
Python code to remove file extension
Python
3 votes314 views2 answers
Python decouple
Python
13 votes307 views3 answers
Python memory usage
Python