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Kirill Smelkov
cpython
Commits
bc8e81dc
Commit
bc8e81dc
authored
Mar 17, 2012
by
Raymond Hettinger
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Section-off the source for better readability.
parent
dce583e0
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Lib/functools.py
Lib/functools.py
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Lib/functools.py
View file @
bc8e81dc
...
...
@@ -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
...
...
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