Practical Data Analysis - Second Edition

Transforming GDF to JSON

Gephi is an excellent tool to get easy and fast results. However, if we want to present the graph interactively on a website, we will need to implement a different kind of visualization. In order to work with the graph in the web, we need to transform our .gdf file to the JSON format.

First we need to import the libraries numpy and json. See Chapter 2, Preprocessing the Data, for more information about the JSON format:

import numpy as np 
import json 

The numpy function genfromtxt will obtain only the ID and Name from the nodes.csv file, using the usecols attribute in the 'object' format:

nodes = np.genfromtxt("nodes.csv",  
                       dtype='object', 
                       delimiter=',', 
                       skip_header=1, 
                       usecols=(0,1)) 

Then, the numpy function genfromtxt will ...