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

4 votes180 views1 answer
How to save matplotlib figure to png
Python
29 votes399 views1 answer
Slice dataframe dwpwnding on column value not emty
Python
8 votes344 views3 answers
Add new column based on condition on some other column in pandas.
Python
2 votes222 views1 answer
Python subprocess with environment variables
Python
2 votes198 views1 answer
How to receive password using tkinter entry
Python
0 vote207 views1 answer
Plague meaning
Python
1 vote239 views1 answer
What is values_list in django orm
Python Django
0 vote245 views1 answer
Python kdtree import
Python
0 vote252 views1 answer
Add a value to the start of a list python
Python
10 votes185 views3 answers
Django make migrations
Python