1berry/cpython
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Eliminate unnecessary variable.

Browse Source
This commit is contained in:
Raymond Hettinger 2013-02-17 00:08:45 -08:00
parent 5df9f82547
commit 832eddeafb
1 changed files with 7 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
Lib/functools.py
View File

@ -228,9 +228,8 @@ def lru_cache(maxsize=128, typed=False):
PREV, NEXT, KEY, RESULT = 0, 1, 2, 3 # names for the link fields
def decorating_function(user_function):
cache = {}
hits = misses = currsize = 0
hits = misses = 0
full = False
cache_get = cache.get # bound method to lookup a key or return None
lock = Lock() # because linkedlist updates aren't threadsafe
@ -250,7 +249,7 @@ def lru_cache(maxsize=128, typed=False):
def wrapper(*args, **kwds):
# simple caching without ordering or size limit
nonlocal hits, misses, currsize
nonlocal hits, misses
key = make_key(args, kwds, typed)
result = cache_get(key, sentinel)
if result is not sentinel:
@ -259,14 +258,13 @@ def lru_cache(maxsize=128, typed=False):
result = user_function(*args, **kwds)
cache[key] = result
misses += 1
currsize += 1
return result
else:
def wrapper(*args, **kwds):
# size limited caching that tracks accesses by recency
nonlocal root, hits, misses, currsize, full
nonlocal root, hits, misses, full
key = make_key(args, kwds, typed)
with lock:
link = cache_get(key)
@ -303,23 +301,22 @@ def lru_cache(maxsize=128, typed=False):
last = root[PREV]
link = [last, root, key, result]
cache[key] = last[NEXT] = root[PREV] = link
currsize += 1
full = (currsize == maxsize)
full = (len(cache) == maxsize)
misses += 1
return result
def cache_info():
"""Report cache statistics"""
with lock:
return _CacheInfo(hits, misses, maxsize, currsize)
return _CacheInfo(hits, misses, maxsize, len(cache))
def cache_clear():
"""Clear the cache and cache statistics"""
nonlocal hits, misses, currsize, full
nonlocal hits, misses, full
with lock:
cache.clear()
root[:] = [root, root, None, None]
hits = misses = currsize = 0
hits = misses = 0
full = False
wrapper.cache_info = cache_info