Network compare

#!/usr/bin/env python     
#coding=utf-8     
    
import igraph as ig    
    
def main():    
    from optparse import OptionParser    
         
    op = OptionParser(usage="usage: %prog file1 [file2 ...]")    
    op.add_option('-c', '--clean', action="store_true", dest="clean", help="Clean output")
    opts, args = op.parse_args()                                                                       
    
    if not args:                                   
        op.error("Need a file to run analysis")
····    
    for arg in args:                               
        try:
            g = ig.load(arg)            
            if opts.clean:
                print arg.split('/')[-1], len(g.vs), len(g.es)
            else:
                print arg.split('/')[-1]                                                               
                print g.summary()
                print 
        except ig.InternalError, e:               
            print e, "Cannot load %s" % (arg,)                                                         
            
if __name__ == "__main__":                                                                             
    d = main()