[Pyobjc-dev] python properties and the bridge

[Matt A. <man...@gm...>]

I have a python property (created with the builtin type "property")
named <key> in a class derived from NSObject.

Getting and setting the property seem to work just fine with the
normal python syntax.  Key-value coding ends up calling the getter and
setter (as long as there is not a variable named '_<key>'; if there
is, it gets set directly without the setter being called).

However, if I call willChangeValueForKey_ on that class, with <key> as
argument, the lookup fails and valueForUndefinedKey_ is called.

Now, functionality-wise, everything seems to go back to working if I
also implement `valueForUndefinedKey_`.  In this case, it's an
exceedingly simple implementation:

  def valueForUndefinedKey_(self, key): return getattr(self,key)

Can anyone shed light on why the lookup for willChangeValueForKey_
fails?  Is there any other way of solving this issue other than
implementing valueForUndefinedKey_ as I have above?

Thanks!
Matt