yet another adjustment to ListAdapter...
class ListAdapter(object):
def __init__(self, parent, key):
self.__parent = parent
self.__key = key
def __cached(self):
try:
return self.__cached_data
except AttributeError:
self.__cached_data = [item.data for item in
self.__parent._data if item.key == self.__key]
return self.__cached_data
__cached = property(__cached)
def __delcached(self):
try:
del self.__cached_data
except AttributeError:
pass
def __iter__(self):
return iter(self.__cached)
def __eq__(self, other):
return list(self) == list(other)
def __repr__(self):
return repr(list(self))
def append(self, item):
self.__delcached()
self.__parent._data.append(DictOfListElement(self.__key, item))
def __getitem__(self, index):
return self.__cached[index]
def __setitem__(self, index, value):
self.__delcached()
[item for item in self.__parent._data if item.key ==
self.__key][index].data = value
# other list like methods
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