Graphviz not drawing graph

Question

I am trying to visualize the neural network graph created by using mxnet inn python. The code is shown below

net = mx.sym.Variable('data')    
net = mx.sym.FullyConnected(data=net, name='fc1', num_hidden=128)    
net = mx.sym.Activation(data=net, name='relu1', act_type="relu")    
net = mx.sym.FullyConnected(data=net, name='fc2', num_hidden=10)    
net = mx.sym.SoftmaxOutput(data=net, name='out')    
mx.viz.plot_network(net, shape={'data':(100,200)})

The last line runs without any error and I see this message - graphviz.dot.Digraph at 0x262f91b8e10>

But I do not see any graph. Please note that I have installed graphviz.

According to [this example](http://josephpcohen.com/w/visualizing-cnn-architectures-side-by-side-with-mxnet/), you may need to save the `graphviz.dot.Digraph` to a variable (let's call it `a`), then call `a.render()`. — unutbu, Feb 27 '17 at 18:30
I had to add the graphviz binaries path in my PATH environment variable and as suggested by unubtu I called a.render() which created a pdf file with the graph in it. Yes, I am using jupyter notebook Leopd — Abhishek Kishore, Feb 28 '17 at 18:14
@AbhishekKishore if you have found a fix, can you please post it as an answer? It will remove this question from the answered pool and might help others too. — lynguyen, Jun 16 '17 at 23:37

Leopd · Answer 1 · 2017-02-28T03:38:12.843

I'm not sure if this is your problem or not. But in Ubuntu at least you need to install graphviz twice: both as a stand-alone package, and also the python bindings separately.

sudo apt-get install -y graphviz
sudo pip install graphviz

If you do all that, and you're in a jupyter notebook, the graphviz object has a method exposed (I forget what it's called) that jupyter introspects and calls to render the drawing.

If you're in a command-line ipython or python shell it of course won't render the drawing, because it can't render graphics.

score 0 · Answer 2 · edited Jun 19 '17 at 06:42

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I had to add the graphviz binaries path in my PATH environment variable and as suggested by unubtu I called a.render() which created a pdf file with the graph in it.

edited Jun 19 '17 at 06:42

Abhishek Gurjar

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answered Jun 19 '17 at 06:14

Abhishek Kishore

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Graphviz not drawing graph

2 Answers2