In my last post, I took some campaign contribution data and plugged it into Neo4j using a sweet Python plugin called py2neo. Now we’re going to take that same graph and give it some added value, namely flesh out the geospatial aspect of it. Getting back to the example from last time, if you take a nice close look, you’ll see that there are postal codes. What’s missing? ….that’s right: You have all these postal codes, but you can’t really do that much with them because you don’t have any…