Exception: "dot" not found in path in python on mac
<p>I want to use <code>caffe.draw</code> to draw the caffe net by anaconda python on mac. But I got the error like this:</p>

<pre><code>File "python/draw_net.py", line 45, in &lt;module&gt;
    main()
  File "python/draw_net.py", line 41, in main
    caffe.draw.draw_net_to_file(net, args.output_image_file, args.rankdir)
  File "/Users/xxh/caffe/distribute/python/caffe/draw.py", line 222, in draw_net_to_file
    fid.write(draw_net(caffe_net, rankdir, ext))
  File "/Users/xxh/caffe/distribute/python/caffe/draw.py", line 204, in draw_net
    return get_pydot_graph(caffe_net, rankdir).create(format=ext)
  File "/Users/xxh/anaconda2/lib/python2.7/site-packages/pydot.py", line 1883, in create
    prog=prog))
Exception: "dot" not found in path.
</code></pre>

<p>I have installed pydot and graphviz ,and how can I add the dot's path to python path?</p>