cherrypy 访问静态文件

This is why /static/css/style.css is found in public/css/style.css
code
import os, os.path
import random
import string
import cherrypy




class StringGenerator(object):
    @cherrypy.expose
    def index(self):
        return """<html>
          <head>
            <link href="/static/css/style.css" rel="stylesheet">
          </head>
          <body>
            <form method="get" action="generate">
              <input type="text" value="8" name="length" />
              <button type="submit">Give it now!</button>
            </form>
          </body>
        </html>"""


    @cherrypy.expose
    def generate(self, length=8):
        some_string = ''.join(random.sample(string.hexdigits, int(length)))
        cherrypy.session['mystring'] = some_string
        return some_string


    @cherrypy.expose
    def display(self):
        return cherrypy.session['mystring']




if __name__ == '__main__':
    conf = {
        '/': {
            'tools.sessions.on': True,
            'tools.staticdir.root': os.path.abspath(os.getcwd())
        },
        '/static': {
            'tools.staticdir.on': True,
            'tools.staticdir.dir': os.path.abspath(os.getcwd())+'/public'
        }
    }
    cherrypy.quickstart(StringGenerator(), '/', conf)