parent observer now static and always last

GPy/core/parameterization/param.py

@@ -161,6 +161,8 @@ class Param(Constrainable, ObservableArray, Gradcheckable):
         return new_arr
     def __setitem__(self, s, val):
         super(Param, self).__setitem__(s, val)
+        if self.has_parent():
+            self._direct_parent_._notify_parameters_changed()
         #self._notify_observers()
         
     #===========================================================================

GPy/core/parameterization/parameter_core.py

@@ -391,8 +391,7 @@ class Parameterizable(Constrainable, Observable):
         # don't overwrite this anymore!
         import itertools
         [p._set_params(params[s]) for p, s in itertools.izip(self._parameters_, self._param_slices_)]
-        self.parameters_changed()
-        self._notify_observers()
+        self._notify_parameters_changed()
 
     def copy(self):
         """Returns a (deep) copy of the current model"""
@@ -428,6 +427,8 @@ class Parameterizable(Constrainable, Observable):
     def _notify_parameters_changed(self, which):
         self.parameters_changed()
         self._notify_observers()
+        if self.has_parent():
+            self._direct_parent_._notify_parameters_changed()
         
     def parameters_changed(self):
         """

GPy/core/parameterization/parameterized.py

@@ -92,7 +92,6 @@ class Parameterized(Parameterizable, Pickleable, Gradcheckable):
                 self.constraints.update(param.constraints, start)
                 self.priors.update(param.priors, start)
                 self._parameters_.insert(index, param)
-            param.add_observer(self, self._notify_parameters_changed)
             self.size += param.size
         else:
             raise RuntimeError, """Parameter exists already added and no copy made"""