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Section-off the source for better readability.

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This commit is contained in:
Raymond Hettinger 2012-03-17 00:24:09 -07:00
parent dce583e0bd
commit bc8e81dcc3
1 changed files with 23 additions and 0 deletions
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23
Lib/functools.py
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@ -18,6 +18,11 @@ try:
except: except:
from _dummy_thread import allocate_lock as Lock from _dummy_thread import allocate_lock as Lock
################################################################################
### update_wrapper() and wraps() decorator
################################################################################
# update_wrapper() and wraps() are tools to help write # update_wrapper() and wraps() are tools to help write
# wrapper functions that can handle naive introspection # wrapper functions that can handle naive introspection
@ -66,6 +71,11 @@ def wraps(wrapped,
return partial(update_wrapper, wrapped=wrapped, return partial(update_wrapper, wrapped=wrapped,
assigned=assigned, updated=updated) assigned=assigned, updated=updated)
################################################################################
### total_ordering class decorator
################################################################################
def total_ordering(cls): def total_ordering(cls):
"""Class decorator that fills in missing ordering methods""" """Class decorator that fills in missing ordering methods"""
convert = { convert = {
@ -94,6 +104,11 @@ def total_ordering(cls):
setattr(cls, opname, opfunc) setattr(cls, opname, opfunc)
return cls return cls
################################################################################
### cmp_to_key() function converter
################################################################################
def cmp_to_key(mycmp): def cmp_to_key(mycmp):
"""Convert a cmp= function into a key= function""" """Convert a cmp= function into a key= function"""
class K(object): class K(object):
@ -120,6 +135,11 @@ try:
except ImportError: except ImportError:
pass pass
################################################################################
### LRU Cache function decorator
################################################################################
_CacheInfo = namedtuple("CacheInfo", ["hits", "misses", "maxsize", "currsize"]) _CacheInfo = namedtuple("CacheInfo", ["hits", "misses", "maxsize", "currsize"])
def lru_cache(maxsize=100, typed=False): def lru_cache(maxsize=100, typed=False):
@ -170,6 +190,7 @@ def lru_cache(maxsize=100, typed=False):
return key return key
if maxsize is None: if maxsize is None:
@wraps(user_function) @wraps(user_function)
def wrapper(*args, **kwds): def wrapper(*args, **kwds):
# simple caching without ordering or size limit # simple caching without ordering or size limit
@ -183,7 +204,9 @@ def lru_cache(maxsize=100, typed=False):
cache[key] = result cache[key] = result
misses += 1 misses += 1
return result return result
else: else:
@wraps(user_function) @wraps(user_function)
def wrapper(*args, **kwds): def wrapper(*args, **kwds):
# size limited caching that tracks accesses by recency # size limited caching that tracks accesses by recency