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Add example, tighten text, and minor clean-ups.

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This commit is contained in:
Raymond Hettinger 2010-11-30 19:15:45 +00:00
parent d01df46848
commit 7496b4171e
4 changed files with 51 additions and 38 deletions
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16
Lib/test/test_functools.py
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@ -501,7 +501,7 @@ class TestLRU(unittest.TestCase):
def orig(x, y):
return 3*x+y
f = functools.lru_cache(maxsize=20)(orig)
maxsize, currsize, hits, misses = f.cache_info()
hits, misses, maxsize, currsize = f.cache_info()
self.assertEqual(maxsize, 20)
self.assertEqual(currsize, 0)
self.assertEqual(hits, 0)
@ -513,18 +513,18 @@ class TestLRU(unittest.TestCase):
actual = f(x, y)
expected = orig(x, y)
self.assertEqual(actual, expected)
maxsize, currsize, hits, misses = f.cache_info()
hits, misses, maxsize, currsize = f.cache_info()
self.assertTrue(hits > misses)
self.assertEqual(hits + misses, 1000)
self.assertEqual(currsize, 20)
f.cache_clear() # test clearing
maxsize, currsize, hits, misses = f.cache_info()
hits, misses, maxsize, currsize = f.cache_info()
self.assertEqual(hits, 0)
self.assertEqual(misses, 0)
self.assertEqual(currsize, 0)
f(x, y)
maxsize, currsize, hits, misses = f.cache_info()
hits, misses, maxsize, currsize = f.cache_info()
self.assertEqual(hits, 0)
self.assertEqual(misses, 1)
self.assertEqual(currsize, 1)
@ -532,7 +532,7 @@ class TestLRU(unittest.TestCase):
# Test bypassing the cache
self.assertIs(f.__wrapped__, orig)
f.__wrapped__(x, y)
maxsize, currsize, hits, misses = f.cache_info()
hits, misses, maxsize, currsize = f.cache_info()
self.assertEqual(hits, 0)
self.assertEqual(misses, 1)
self.assertEqual(currsize, 1)
@ -548,7 +548,7 @@ class TestLRU(unittest.TestCase):
for i in range(5):
self.assertEqual(f(), 20)
self.assertEqual(f_cnt, 5)
maxsize, currsize, hits, misses = f.cache_info()
hits, misses, maxsize, currsize = f.cache_info()
self.assertEqual(hits, 0)
self.assertEqual(misses, 5)
self.assertEqual(currsize, 0)
@ -564,7 +564,7 @@ class TestLRU(unittest.TestCase):
for i in range(5):
self.assertEqual(f(), 20)
self.assertEqual(f_cnt, 1)
maxsize, currsize, hits, misses = f.cache_info()
hits, misses, maxsize, currsize = f.cache_info()
self.assertEqual(hits, 4)
self.assertEqual(misses, 1)
self.assertEqual(currsize, 1)
@ -581,7 +581,7 @@ class TestLRU(unittest.TestCase):
# * * * *
self.assertEqual(f(x), x*10)
self.assertEqual(f_cnt, 4)
maxsize, currsize, hits, misses = f.cache_info()
hits, misses, maxsize, currsize = f.cache_info()
self.assertEqual(hits, 12)
self.assertEqual(misses, 4)
self.assertEqual(currsize, 2)