Moved cached_property to compressor.utils.cache.

This commit is contained in:
Jannis Leidel
2011-04-16 19:42:04 +02:00
parent 5f6e5aec3b
commit 536e5af004
4 changed files with 69 additions and 68 deletions

View File

@@ -76,7 +76,7 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
utils.cached_property extracted from Celery
utils.cache.cached_property extracted from Celery
-------------------------------------------
Copyright (c) 2009-2011, Ask Solem and contributors.
All rights reserved.

View File

@@ -12,7 +12,8 @@ from compressor.conf import settings
from compressor.exceptions import CompressorError, UncompressableFileError
from compressor.filters import CompilerFilter
from compressor.storage import default_storage
from compressor.utils import get_class, cached_property, staticfiles
from compressor.utils import get_class, staticfiles
from compressor.utils.cache import cached_property
class Compressor(object):
"""

View File

@@ -60,72 +60,6 @@ def walk(root, topdown=True, onerror=None, followlinks=False):
for link_dirpath, link_dirnames, link_filenames in walk(p):
yield (link_dirpath, link_dirnames, link_filenames)
class cached_property(object):
"""Property descriptor that caches the return value
of the get function.
*Examples*
.. code-block:: python
@cached_property
def connection(self):
return Connection()
@connection.setter # Prepares stored value
def connection(self, value):
if value is None:
raise TypeError("Connection must be a connection")
return value
@connection.deleter
def connection(self, value):
# Additional action to do at del(self.attr)
if value is not None:
print("Connection %r deleted" % (value, ))
"""
def __init__(self, fget=None, fset=None, fdel=None, doc=None):
self.__get = fget
self.__set = fset
self.__del = fdel
self.__doc__ = doc or fget.__doc__
self.__name__ = fget.__name__
self.__module__ = fget.__module__
def __get__(self, obj, type=None):
if obj is None:
return self
try:
return obj.__dict__[self.__name__]
except KeyError:
value = obj.__dict__[self.__name__] = self.__get(obj)
return value
def __set__(self, obj, value):
if obj is None:
return self
if self.__set is not None:
value = self.__set(obj, value)
obj.__dict__[self.__name__] = value
def __delete__(self, obj):
if obj is None:
return self
try:
value = obj.__dict__.pop(self.__name__)
except KeyError:
pass
else:
if self.__del is not None:
self.__del(obj, value)
def setter(self, fset):
return self.__class__(self.__get, fset, self.__del)
def deleter(self, fdel):
return self.__class__(self.__get, self.__set, fdel)
"""Advanced string formatting for Python >= 2.4.
An implementation of the advanced string formatting (PEP 3101).

66
compressor/utils/cache.py Normal file
View File

@@ -0,0 +1,66 @@
class cached_property(object):
"""Property descriptor that caches the return value
of the get function.
*Examples*
.. code-block:: python
@cached_property
def connection(self):
return Connection()
@connection.setter # Prepares stored value
def connection(self, value):
if value is None:
raise TypeError("Connection must be a connection")
return value
@connection.deleter
def connection(self, value):
# Additional action to do at del(self.attr)
if value is not None:
print("Connection %r deleted" % (value, ))
"""
def __init__(self, fget=None, fset=None, fdel=None, doc=None):
self.__get = fget
self.__set = fset
self.__del = fdel
self.__doc__ = doc or fget.__doc__
self.__name__ = fget.__name__
self.__module__ = fget.__module__
def __get__(self, obj, type=None):
if obj is None:
return self
try:
return obj.__dict__[self.__name__]
except KeyError:
value = obj.__dict__[self.__name__] = self.__get(obj)
return value
def __set__(self, obj, value):
if obj is None:
return self
if self.__set is not None:
value = self.__set(obj, value)
obj.__dict__[self.__name__] = value
def __delete__(self, obj):
if obj is None:
return self
try:
value = obj.__dict__.pop(self.__name__)
except KeyError:
pass
else:
if self.__del is not None:
self.__del(obj, value)
def setter(self, fset):
return self.__class__(self.__get, fset, self.__del)
def deleter(self, fdel):
return self.__class__(self.__get, self.__set, fdel)