python web.py乱码怎么解决？

#!/usr/bin/env python 

# encoding: utf-8 

import web

urls = (

    '/', 'index'

)

class index:

    def GET(self):

        web.header('Content-Type', 'text/html;charset=UTF-8')

        return "<h1>你好!</h1>"

if __name__ == "__main__":

    app = web.application(urls, globals())

    app.run()