Update visualize_util

docs/templates/visualization.md

@@ -10,6 +10,11 @@ from keras.utils.visualize_util import plot
 plot(model, to_file='model.png')
 ```
 
+`plot` takes two optional arguments:
+
+- `recursive` (defaults to True) controls whether we recursively explore container layers.
+- `show_shape` (defaults to False) controls whether output shapes are shown in the graph.
+
 You can also directly obtain the `pydot.Graph` object and render it yourself,
 for example to show it in an ipython notebook :
 ```python

keras/layers/core.py

@@ -1722,6 +1722,10 @@ class Siamese(Layer):
                     self.constraints.append(c)
         super(Siamese, self).__init__()
 
+    @property
+    def input_shape(self):
+        return [layer.output_shape for layer in self.inputs]
+
     @property
     def output_shape(self):
         if self.merge_mode is None:

keras/utils/visualize_util.py

@@ -149,6 +149,6 @@ def to_graph(model, **kwargs):
     return ModelToDot()(model, **kwargs)
 
 
-def plot(model, to_file='model.png'):
-    graph = to_graph(model)
+def plot(model, to_file='model.png', **kwargs):
+    graph = to_graph(model, **kwargs)
     graph.write_png(to_file)