Saving form state between requests in webpy

gistfile1.py

class Form(web.form.Form, object):
    
    def __init__(self, name, *inputs, **kw):
        super(Form, self).__init__(*inputs, **kw)
        self.name = name
    
    def save_state(self):
        session.forms[self.name] = dict(
            notes = dict((i.name, i.note) for i in self.inputs if i.note ),
            values = dict((i.name, i.get_value()) for i in self.inputs ),
            note = self.note       
        )
    
    def load_state(self):
        n = session.forms.pop(self.name, None)
        if n:
            self.note = n["note"]
            for i in self.inputs:
                i.note = n["notes"].get(i.name, "")
                i.set_value(n["values"].get(i.name, ""))
    
    def validates(self, source=None, _validate=True, **kw):
        out = super(Form, self).validates(source, _validate, **kw)
        if not out:
            self.save_state()
        return out
    
    def render_css(self):
        self.load_state()
        return super(Form, self).render_css()