$ python main.py
<html>
 <body>
  <h1>Update user</h1>
  <div class="main-content">
<form action="update.cgi" method="post">
  <p>
    <label>Name:</label>
    <input type="text" name="name" value="Foo" />
  </p>
  <p>
    <label>Gender:</label>
    <input type="radio" name="gender" value="M"  checked="checked" />Man
    <input type="radio" name="gender" value="W"  />Woman
  </p>
  <input type="submit" value="Update" />
</form>

  </div>
 </body>
</html>
