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| author | Raymond Hettinger <python@rcn.com> | 2012-03-17 00:04:11 (GMT) |
|---|---|---|
| committer | Raymond Hettinger <python@rcn.com> | 2012-03-17 00:04:11 (GMT) |
| commit | d37fb559102d9c20786d8578a0362d1cd44aada2 (patch) | |
| tree | 55a110bbd93fea6e3d719e3951abb13ee2348201 | |
| parent | 6e8c8176879915fa1f7d6f6d081136584f4bd315 (diff) | |
| download | cpython-d37fb559102d9c20786d8578a0362d1cd44aada2.zip cpython-d37fb559102d9c20786d8578a0362d1cd44aada2.tar.gz cpython-d37fb559102d9c20786d8578a0362d1cd44aada2.tar.bz2 | |
Unique sentinel value for cache.get()
| -rw-r--r-- | Lib/functools.py | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Lib/functools.py b/Lib/functools.py index adc7927..3eb55c6 100644 --- a/Lib/functools.py +++ b/Lib/functools.py @@ -175,8 +175,8 @@ def lru_cache(maxsize=100, typed=False): # simple caching without ordering or size limit nonlocal hits, misses key = make_key(args, kwds, typed) if kwds or typed else args - result = cache_get(key) - if result is not None: + result = cache_get(key, root) # root used here as a unique not-found sentinel + if result is not root: hits += 1 return result result = user_function(*args, **kwds) |