如何在 python web.py 中使用单选按钮

我正在使用 web.py 框架来创建一个简单的 Web 应用程序

I am using web.py framework to create a simple web application

我想创建一个单选按钮所以我写了下面的代码

I want to create a radio button so I wrote the following code

from web import form
from web.contrib.auth import DBAuth
import MySQLdb as mdb



render = web.template.render('templates/')

urls = (
  '/project_details',  'Project_Details',  
)

class Project_Details:

    project_details = form.Form( 
        form.Radio('Home Page'),
        form.Radio('Content'),
        form.Radio('Contact Us'),
        form.Radio('Sitemap'),
        )

    def GET(self):
        project_details = self.project_details()
        return render.projectdetails(project_details)  

当我使用 url localhost:8080 运行代码时，我看到以下错误

When I run the code with url localhost:8080 I am seeing following error

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/web/application.py", line 237, in process
    return p(lambda: process(processors))
  File "/usr/lib/python2.7/site-packages/web/application.py", line 565, in processor
    h()
  File "/usr/lib/python2.7/site-packages/web/application.py", line 661, in __call__
    self.check(mod)
  File "/usr/lib/python2.7/site-packages/web/application.py", line 680, in check
    reload(mod)
  File "/home/local/user/python_webcode/index.py", line 68, in <module>
    class Project_Details:
  File "/home/local/user/python_webcode/index.py", line 72, in Project_Details
    form.Radio('password'),
TypeError: __init__() takes at least 3 arguments (2 given)

单选按钮需要传入什么参数才能避免这个错误

What parameter need to be passed in the radio button in order to avoid this error