Python script to generate random edge list of graph based on nodes and edges

gen-random-graph.py

#!/usr/bin/python
import sys
import random


def main(argList):

        if '-edges' in argList:
                a = argList.index('-edges')
                edges = int(argList[a+1])
        else:
                edges = 512

        if '-nodes' in argList:
                a = argList.index('-nodes')
                nodes=int(argList[a+1])
        else:
                nodes = 128

        if '-seed' in argList:
                a = argList.index('-seed')
                seed = int(argList[a+1])
        else:
                seed = 1048576

        for i in genPair(nodes,edges,seed):
                print i


def genPair(nodes, edges, seed):
        graph = set()
        nodeList = range(nodes)
        random.seed(seed)
        while len(graph) < edges:
                pair = "\"%s\",\"%s\",-" % (str(random.choice(nodeList)), str(random.choice(nodeList)))
                graph.add(pair)

        return  graph

if __name__ == '__main__':
        main(sys.argv[1:])