#only works for undirected graphs
def degreeCentralization():
    maxDegVar = 0
    maxDegVar = (len(g.nodes)-1) * (len(g.nodes)-2)
    g.nodes[0].totaldegree
    degVar = 0
    
    for x in range(totaldegree.max+1):
        list = (totaldegree == x)
        for node in list:
            degVar += (totaldegree.max - node.totaldegree)
            

    print degVar
    print maxDegVar
    return degVar/maxDegVar


def betweenCentralization():
    maxDegVar = 0
    degVar = 0