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authorRaymond Hettinger <python@rcn.com>2012-03-17 07:24:09 (GMT)
committerRaymond Hettinger <python@rcn.com>2012-03-17 07:24:09 (GMT)
commitbc8e81dcc32b42164fe158f1daf91ac93426efbf (patch)
treea0279d4feb3ef78d223bce97c719596ade3c9806 /Lib/functools.py
parentdce583e0bdb63b7b98b748b4ad12d1fbdb22462b (diff)
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Section-off the source for better readability.
Diffstat (limited to 'Lib/functools.py')
-rw-r--r--Lib/functools.py23
1 files changed, 23 insertions, 0 deletions
diff --git a/Lib/functools.py b/Lib/functools.py
index dd653f4..f4c8271 100644
--- a/Lib/functools.py
+++ b/Lib/functools.py
@@ -18,6 +18,11 @@ try:
except:
from _dummy_thread import allocate_lock as Lock
+
+################################################################################
+### update_wrapper() and wraps() decorator
+################################################################################
+
# update_wrapper() and wraps() are tools to help write
# wrapper functions that can handle naive introspection
@@ -66,6 +71,11 @@ def wraps(wrapped,
return partial(update_wrapper, wrapped=wrapped,
assigned=assigned, updated=updated)
+
+################################################################################
+### total_ordering class decorator
+################################################################################
+
def total_ordering(cls):
"""Class decorator that fills in missing ordering methods"""
convert = {
@@ -94,6 +104,11 @@ def total_ordering(cls):
setattr(cls, opname, opfunc)
return cls
+
+################################################################################
+### cmp_to_key() function converter
+################################################################################
+
def cmp_to_key(mycmp):
"""Convert a cmp= function into a key= function"""
class K(object):
@@ -120,6 +135,11 @@ try:
except ImportError:
pass
+
+################################################################################
+### LRU Cache function decorator
+################################################################################
+
_CacheInfo = namedtuple("CacheInfo", ["hits", "misses", "maxsize", "currsize"])
def lru_cache(maxsize=100, typed=False):
@@ -170,6 +190,7 @@ def lru_cache(maxsize=100, typed=False):
return key
if maxsize is None:
+
@wraps(user_function)
def wrapper(*args, **kwds):
# simple caching without ordering or size limit
@@ -183,7 +204,9 @@ def lru_cache(maxsize=100, typed=False):
cache[key] = result
misses += 1
return result
+
else:
+
@wraps(user_function)
def wrapper(*args, **kwds):
# size limited caching that tracks accesses by recency