Python SimpleHTTPServer with address reusage

pywebserv.py

#!/usr/bin/env python

import SimpleHTTPServer
import SocketServer
import sys
import os
import getopt

def main(argv):
    try:
        opts, args = getopt.getopt(argv[1:], 'p:hd:')
    except getopt.GetoptError, err:
        print_usage(argv[0], err.message)
        sys.exit(1)

    serve_dir = os.getcwd()
    port = 8000
    for opt, arg in opts:
        if opt == '-p':
           port = int(arg)
        elif opt == '-d':
           serve_dir = arg
        elif opt == '-h':
           print_usage(argv[0])
           sys.exit(1)

    run_http_server(serve_dir, port)

def run_http_server(directory, port):
    os.chdir(directory)
    Handler = SimpleHTTPServer.SimpleHTTPRequestHandler
    httpd = SocketServer.TCPServer(("", port), Handler, bind_and_activate=False)
    httpd.allow_reuse_address = True
    httpd.server_bind()
    httpd.server_activate()
    print("serving {0} at port {1}".format(directory, port))
    httpd.serve_forever()

def print_usage(argv0, err_msg=None):
    if err_msg is not None:
       print("\nERROR: {0}".format(err_msg))
    print("\nUsage: {0} [-p port] [-d directory]\n".format(argv0))
    print("\t-p port: port to serve requests on (default 8000)")
    print("\t-d dir : directory to serve contents from (default current directory)")
    print("")

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