http://nbviewer.ipython.org/github/BrusselsDataScienceCommunity/SNA/blob/master/Using_NetworkX_for_graphs.ipynb

read_gdf.py

def read_gdf(path,directed = False):
    if directed:
        G = nx.DiGraph()
    else:
        G = nx.Graph()
    state = None
    nodes = []
    edges = []
    for line in open(path,'r'):
        line = line.rstrip()
        if line[0:8] == 'nodedef>':
            state = 'nodes'
            nodeattr = [x.split()[0] for x in line[8:].split(',')]
        elif line[0:8]== 'edgedef>':
            state = 'edges'
            edgeattr = [x.split()[0] for x in line[8:].split(',')]
        else:
            if state == 'nodes':
                nodes.append(line.split(','))
            elif state == 'edges':
                edges.append(line.split(','))
            else:
                print 'Unused line!'
    for n in nodes:
        G.add_node(n[0])
        for idx,extradata in enumerate(n[1:]):
            G.node[n[0]][nodeattr[idx+1]]=extradata
    for e in edges:
        G.add_edge(e[0],e[1])
        for idx,extradata in enumerate(e[2:]):
            G.node[e[0]][e[1]][nodeattr[idx+2]]=extradata
    return G