title: keras plot_model tells me to install pydot
body: <p>I'm using python 3.6.3 on a windows 10 machine. I installed pydot and graphviz using pip install via:</p>
  
  <pre><code>    py -m pip install pydot
      py -m pip install graphviz
  </code></pre>
  
  <p>I also went to the graphviz website and downloaded and installed the windows version here: <a href="http://www.graphviz.org/Download_windows.php" rel="noreferrer">http://www.graphviz.org/Download_windows.php</a> which default installed to program files(x86). But when I go to plot my model in keras, I still get the error saying I have to install pydot and graphviz and that the import failed. I can do</p>
  
  <pre><code>    import pydot
      import graphviz
  </code></pre>
  
  <p>on my python console just fine, they throw no errors. What else should I do to be able to graph my neural net?</p>