On 11 Jul, 2010, at 1:18, Georg Seifert wrote: > Hi Ronald, > > Thanks for your response. > > I did tried this: > > class PathNodesProxy (object): > def __init__(self, owner): > self._ower = owner > def __getitem__(self, i): > print "__getitem__", i > return self.nodeAtIndex_(i) > def __setitem__(self, i, Node): > print "__setitem__", i, Node > self.setNode_atIndex_(Node, i) > def __delitem__(self, i): > print "__delitem__", i > self.removeNodeAtIndex_(i) > def append(self, Node): > print "append", Node > self.addNode_(Node) > def count(self): > print "count" > return self.nodes().count() > > del GSPath.__dict__['nodes'] > GSPath.__dict__['nodes'] = lambda self: PathNodesProxy(self) > > the next to last line gives this error: > TypeError: 'dictproxy' object does not support item deletion > and the last (if I remove the first): > TypeError: 'dictproxy' object does not support item assignment > > If I used: > GSPath.nodes = lambda self: PathNodesProxy(self) > It worked somehow, but it actually removed the nodes property from the cocoa > object. And I still had to use the parenthesis.
This should work:
GSPath.nodes = property(lambda self: PathNodesProxy(self))
I've tested this with the count property on an array:
:>>> from Foundation import NSArray
:>>> b = NSArray.arrayWithArray_([1,2])
:>>> type(b).count = property(lambda self: id(self))
:>>> b.pyobjc_instanceMethods.count()
2
:>>> b.count
4359092688
:>>>
(The convoluted way to change the count property is because NSArray is a class
cluster and is not relevant for your problem)
Ronald
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