PrintNodeTree() fix for servers #17
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The problem that I did not realize is that the development library of graphviz is easy to get on ubuntu or mac but is not available on either LPC or LXPLUS servers and we can't install it without a bit of a headache. Without it, pygraphviz cannot be compiled.
networkxcan instead usepydotwhich does not have the same build dependencies but nonetheless cannot write out to modern image formats like PNG because the graphviz version installed on these systems.The solution is to just save out the .dot file for now with instructions on how to convert it to PNG locally in the FAQ section of the docs.