Something

def dbg(format, *args):    if options.debug:        fr = sys._getframe(1)        filename = os.path.basename(fr.f_code.co_filename)        func = fr.f_code.co_name        lineno = fr.f_lineno        sys.stderr.write(('%s:%s():%d: ' + format + '\n')                         % ((filename, func, lineno) + args))def info(format, *args):    if not options.quiet:        print format % argsdef warn(format, *args):    sys.stderr.write(('Warning: ' + format + '\n') % args)def err(format, *args):    sys.stderr.write(('Error: ' + format + '\n') % args)    sys.exit(1)