How to use cachetools - 10 common examples

@cachetools.cached(_profile_cache)
def get_profile(name):
    return Profile.get_by_name(name)

def test_decorator(self):
        cache = self.cache(2)
        wrapper = cachetools.cached(cache)(self.func)

        self.assertEqual(len(cache), 0)
        self.assertEqual(wrapper.__wrapped__, self.func)

        self.assertEqual(wrapper(0), 0)
        self.assertEqual(len(cache), 1)
        self.assertIn(cachetools.keys.hashkey(0), cache)
        self.assertNotIn(cachetools.keys.hashkey(1), cache)
        self.assertNotIn(cachetools.keys.hashkey(1.0), cache)

        self.assertEqual(wrapper(1), 1)
        self.assertEqual(len(cache), 2)
        self.assertIn(cachetools.keys.hashkey(0), cache)
        self.assertIn(cachetools.keys.hashkey(1), cache)
        self.assertIn(cachetools.keys.hashkey(1.0), cache)

        self.assertEqual(wrapper(1), 1)
        self.assertEqual(len(cache), 2)

        self.assertEqual(wrapper(1.0), 1)
        self.assertEqual(len(cache), 2)

        self.assertEqual(wrapper(1.0), 1)
        self.assertEqual(len(cache), 2)

wrapper = cachetools.cached(cache)(self.func)

        self.assertEqual(len(cache), 0)
        self.assertEqual(wrapper.__wrapped__, self.func)

        self.assertEqual(wrapper(0), 0)
        self.assertEqual(len(cache), 1)
        self.assertIn(cachetools.keys.hashkey(0), cache)
        self.assertNotIn(cachetools.keys.hashkey(1), cache)
        self.assertNotIn(cachetools.keys.hashkey(1.0), cache)

        self.assertEqual(wrapper(1), 1)
        self.assertEqual(len(cache), 2)
        self.assertIn(cachetools.keys.hashkey(0), cache)
        self.assertIn(cachetools.keys.hashkey(1), cache)
        self.assertIn(cachetools.keys.hashkey(1.0), cache)

        self.assertEqual(wrapper(1), 1)
        self.assertEqual(len(cache), 2)

        self.assertEqual(wrapper(1.0), 1)
        self.assertEqual(len(cache), 2)

        self.assertEqual(wrapper(1.0), 1)
        self.assertEqual(len(cache), 2)

def cache(self, minsize):
        return cachetools.Cache(maxsize=minsize)

import unittest

import cachetools

from . import CacheTestMixin


class CacheTest(unittest.TestCase, CacheTestMixin):

    Cache = cachetools.Cache

def test_decorator(self):
        cache = self.cache(2)
        wrapper = cachetools.cached(cache)(self.func)

        self.assertEqual(len(cache), 0)
        self.assertEqual(wrapper.__wrapped__, self.func)

        self.assertEqual(wrapper(0), 0)
        self.assertEqual(len(cache), 1)
        self.assertIn(cachetools.keys.hashkey(0), cache)
        self.assertNotIn(cachetools.keys.hashkey(1), cache)
        self.assertNotIn(cachetools.keys.hashkey(1.0), cache)

        self.assertEqual(wrapper(1), 1)
        self.assertEqual(len(cache), 2)
        self.assertIn(cachetools.keys.hashkey(0), cache)
        self.assertIn(cachetools.keys.hashkey(1), cache)
        self.assertIn(cachetools.keys.hashkey(1.0), cache)

        self.assertEqual(wrapper(1), 1)
        self.assertEqual(len(cache), 2)

        self.assertEqual(wrapper(1.0), 1)
        self.assertEqual(len(cache), 2)

        self.assertEqual(wrapper(1.0), 1)

    @cachedmethod(operator.attrgetter('cache'), key=keys.typedkey)
    def get_typed(self, value):
        count = self.count
        self.count += 1
        return count

def test_lfu_getsizeof(self):
        cache = LFUCache(maxsize=3, getsizeof=lambda x: x)

        cache[1] = 1
        cache[2] = 2

        self.assertEqual(len(cache), 2)
        self.assertEqual(cache[1], 1)
        self.assertEqual(cache[2], 2)

        cache[3] = 3

        self.assertEqual(len(cache), 1)
        self.assertEqual(cache[3], 3)
        self.assertNotIn(1, cache)
        self.assertNotIn(2, cache)

        with self.assertRaises(ValueError):

def test_lfu(self):
        cache = LFUCache(maxsize=2)

        cache[1] = 1
        cache[1]
        cache[2] = 2
        cache[3] = 3

        self.assertEqual(len(cache), 2)
        self.assertEqual(cache[1], 1)
        self.assertTrue(2 in cache or 3 in cache)
        self.assertTrue(2 not in cache or 3 not in cache)

        cache[4] = 4
        self.assertEqual(len(cache), 2)
        self.assertEqual(cache[4], 4)
        self.assertEqual(cache[1], 1)

self.assertEqual(cached.cache_info(), (2, 1, 128, 1))


class LFUDecoratorTest(unittest.TestCase, DecoratorTestMixin):

    DECORATOR = staticmethod(cachetools.func.lfu_cache)


class LRUDecoratorTest(unittest.TestCase, DecoratorTestMixin):

    DECORATOR = staticmethod(cachetools.func.lru_cache)


class RRDecoratorTest(unittest.TestCase, DecoratorTestMixin):

    DECORATOR = staticmethod(cachetools.func.rr_cache)


class TTLDecoratorTest(unittest.TestCase, DecoratorTestMixin):

    DECORATOR = staticmethod(cachetools.func.ttl_cache)