Le 16/09/2011 10:07, Stéphane Klein a écrit :
> Le 30/01/2011 12:12, Vincent Pelletier a écrit :
>> Le dimanche 30 janvier 2011 09:52:32, Stéphane Klein a écrit :
>>> How can I append Persistent mechanism to this OrderedDict class ?
>>
>> You should probably read the code for PersistentMapping[1] and adapt it to
>> OrderedDict's API.
>>
>> [1]
>> http://svn.zope.org/ZODB/trunk/src/persistent/mapping.py?rev=113734&view=markup
>>
>
> Hi,
>
> I'll try that :
>
> from collections import OrderedDict
> from persistent import Persistent
>
> class PersistentOrderedDict(OrderedDict, Persistent):
> pass
>
> but I've this error :
>
> TypeError: Error when calling the metaclass bases
> multiple bases have instance lay-out conflict
>
> Then, I can't do like "persistent.mapping.PersistentMapping"
>
> class PersistentMapping(UserDict.IterableUserDict,
> persistent.Persistent)"
>
> I need to create
> PersistentOrderedDict that need to be a "proxy" class over OrderedDict,
> and a child on Persistent ?
I've just created this class, what do you about ?
from collections import OrderedDict
from persistent import Persistent
class PersistentOrderedDict(Persistent):
def __init__(self, *args, **kwds):
self.__data = OrderedDict(*args, **kwds)
def __setitem__(self, key, value, PREV=0, NEXT=1,
dict_setitem=dict.__setitem__):
res = self.__data.__setitem__(key, value, PREV=0, NEXT=1,
dict_setitem=dict.__setitem__)
self._p_changed = 1
return res
def __delitem__(self, key, PREV=0, NEXT=1,
dict_delitem=dict.__delitem__):
res = self.__data.__delitem__(key, PREV=0, NEXT=1,
dict_delitem=dict.__delitem__)
self._p_changed = 1
return res
def __iter__(self, NEXT=1, KEY=2):
return self.__data.__iter__(NEXT=1, KEY=2)
def __reversed__(self, PREV=0, KEY=2):
return self.__data.__reversed__(PREV=0, KEY=2)
def __reduce__(self):
return self.__data.__reduce__()
def clear(self):
return self.__data.clear()
def setdefault(self, key, default=None):
if key in self.__data:
return self.__data[key]
self.__data[key] = default
self._p_changed = 1
return default
def update(self, other):
res = self.__data.update(other)
self._p_changed = 1
return res
def pop(self, key, default=None):
res = self.__data.pop(key, default)
self._p_changed = 1
return res
def keys(self):
return self.__data.keys()
def values(self):
return self.__data.values()
def items(self):
return self.__data.items()
def iterkeys(self):
return self.__data.iterkeys()
def itervalues(self):
return self.__data.itervalues()
def iteritems(self):
return self.__data.iteritems()
def __ne__(self, other):
return self.__ne__(other)
def viewkeys(self):
return self.__data.viewkeys()
def viewvalues(self):
return self.__data.viewvalues()
def viewitems(self):
return self.__data.viewitems()
def popitem(self, last=True):
return self.__data.popitem(last=last)
def __repr__(self):
return self.__data.__repr__()
def copy(self):
return self.__data.copy()
@classmethod
def fromkeys(cls, iterable, value=None):
return OrderedDict.fromkeys(iterable, value)
def __eq__(self, other):
return self.__data.__eq__(other)
--
Stéphane Klein <steph...@harobed.org>
blog: http://stephane-klein.info
Twitter: http://twitter.com/klein_stephane
pro: http://www.is-webdesign.com
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