How to do form.fill

suppose you have a form like:

form = web.form.Form(
web.form.Textbox('name', description='Name'),
web.form.Textbox('subject', description='Subject'),
web.form.Textarea('body', description='Message'),
)

You can pass a dictionary mapping values to form objects like:

form.fill(
{
'subject':'This is my subject!',
'body':t'This is the body!',
}
)

and these values will fill your textboxes.