[mod_python] HTML POST handle

Hi,

    I am newbie for Mod_Python.Today, i write code to handle HTML
requst.But i failed.
    Follow code block is my python code:
----------------------------------------------
from mod_python import util

def Login (req):
    data = util.FieldStorage(req)
    return "login:", data.keys()
----------------------------------------------
    HTML code is following:
----------------------------------------------
<form method="POST" action="login.py/Login">
              <table border="1" width="100%">
                <tr>
                  <td width="100%" colspan="2">
                    <p align="center">Login</p>
                  </td>
                </tr>
                <tr>
                  <td width="39%">User</td>
                  <td width="61%"><input type="text" name="User" size="30"></td>
                </tr>
                <tr>
                  <td width="39%">Password:</td>
                  <td width="61%"><input type="password"
name="Password" size="30"></td>
                </tr>
                <tr>
                  <td width="100%" colspan="2">
              <p align="center">
              <input type="submit" value="Login" name="B1"></p>
                  </td>
                </tr>
              </table>
            </form>
------------------------------------

The code execute result follow:
---------------------------------------------
('login:', [])


   The python code can't get HTML request varible from result.How to do?

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