py3 compatibility#21

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Commits on Dec 12, 2017

for py3: Add brackets to print statements. Swap 'unicode' with 'six.text_type'
donalm
committed
remove unused imports (re and json) and unused variable attrName
donalm
committed
add methods to load and save graphs as networkx/json
donalm
committed

Commits on Mar 28, 2018