From 16e2fbd6cbe5c1f946755aff5cef2741b0939bea Mon Sep 17 00:00:00 2001
From: James Hensman <james.hensman@gmail.com>
Date: Wed, 26 Feb 2014 15:54:43 +0000
Subject: [PATCH] pydot graphing half done

---
 GPy/core/parameterization/param.py         |  9 +++++++++
 GPy/core/parameterization/parameterized.py | 20 ++++++++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/GPy/core/parameterization/param.py b/GPy/core/parameterization/param.py
index 53b2260e..b48bec0d 100644
--- a/GPy/core/parameterization/param.py
+++ b/GPy/core/parameterization/param.py
@@ -60,6 +60,15 @@ class Param(Constrainable, ObservableArray, Gradcheckable):
     def __init__(self, name, input_array, default_constraint=None, *a, **kw):
         super(Param, self).__init__(name=name, default_constraint=default_constraint, *a, **kw)
 
+    def build_pydot(self,G):
+        import pydot
+        node = pydot.Node(id(self), shape='record', label=self.name)
+        G.add_node(node)
+        for o in self._observer_callables_.keys():
+            print o, self.hirarchy_name()
+
+        return node
+
     def __array_finalize__(self, obj):
         # see InfoArray.__array_finalize__ for comments
         if obj is None: return
diff --git a/GPy/core/parameterization/parameterized.py b/GPy/core/parameterization/parameterized.py
index 16ae43a7..83a62161 100644
--- a/GPy/core/parameterization/parameterized.py
+++ b/GPy/core/parameterization/parameterized.py
@@ -64,6 +64,26 @@ class Parameterized(Parameterizable, Pickleable, Gradcheckable):
         self._connect_parameters()
         del self._in_init_
 
+    def build_pydot(self, G=None):
+        import pydot
+        iamroot = False
+        if G is None:
+            G = pydot.Dot(graph_type='digraph')
+            iamroot=True
+        node = pydot.Node(id(self), shape='record', label=self.name)
+        G.add_node(node)
+        for child in self._parameters_:
+            child_node = child.build_pydot(G)
+            G.add_edge(pydot.Edge(node, child_node))
+
+        for o in self._observer_callables_.keys():
+            print id(o), self.hirarchy_name()
+
+        if iamroot:
+            return G
+        return node
+
+
     def add_parameter(self, param, index=None):
         """
         :param parameters:  the parameters to add