mirrors
/
cpython
mirror of https://github.com/python/cpython.git
2
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Unique sentinel value for cache.get()

This commit is contained in:
Raymond Hettinger 2012-03-16 17:04:11 -07:00
parent 6e8c817687
commit d37fb55910
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Lib/functools.py
View File

@ -175,8 +175,8 @@ def wrapper(*args, **kwds):
# simple caching without ordering or size limit # simple caching without ordering or size limit
nonlocal hits, misses nonlocal hits, misses
key = make_key(args, kwds, typed) if kwds or typed else args key = make_key(args, kwds, typed) if kwds or typed else args
result = cache_get(key) result = cache_get(key, root) # root used here as a unique not-found sentinel
if result is not None: if result is not root:
hits += 1 hits += 1
return result return result
result = user_function(*args, **kwds) result = user_function(*args, **kwds)