[Python-checkins] cpython: Factor out shared variables.

Sun Apr 29 23:57:23 CEST 2012

http://hg.python.org/cpython/rev/2adcd28a5a3a
changeset: 76649:2adcd28a5a3a
parent: 76643:399cb1afb747
user: Raymond Hettinger <python at rcn.com>
date: Sun Apr 29 14:55:27 2012 -0700
summary:
 Factor out shared variables.
files:
 Lib/functools.py | 10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/Lib/functools.py b/Lib/functools.py
--- a/Lib/functools.py
+++ b/Lib/functools.py
@@ -167,18 +167,20 @@
 # The internals of the lru_cache are encapsulated for thread safety and
 # to allow the implementation to change (including a possible C version).
 
+ # Constants shared by all lru cache instances:
+ kwd_mark = (object(),) # separate positional and keyword args
+ sentinel = object() # unique object used to signal cache misses
+ _len = len # localize the global len() function
+ PREV, NEXT, KEY, RESULT = 0, 1, 2, 3 # names for the link fields
+
 def decorating_function(user_function):
 
 cache = {}
 hits = misses = 0
- kwd_mark = (object(),) # separate positional and keyword args
 cache_get = cache.get # bound method to lookup a key or return None
- sentinel = object() # unique object used with cache_get
- _len = len # localize the global len() function
 lock = Lock() # because linkedlist updates aren't threadsafe
 root = [] # root of the circular doubly linked list
 root[:] = [root, root, None, None] # initialize by pointing to self
- PREV, NEXT, KEY, RESULT = 0, 1, 2, 3 # names for the link fields
 
 def make_key(args, kwds, typed, tuple=tuple, sorted=sorted, type=type):
 # build a cache key from positional and keyword args
-- 
Repository URL: http://hg.python.org/cpython
