Mod_python error: "PythonHandler mod_python.publisher"
Traceback (most recent call last):
  File "/opt/csw/lib/python2.3/site-packages/mod_python/apache.py", line 299, in HandlerDispatch
    result = object(req)
  File "/opt/csw/lib/python2.3/site-packages/mod_python/publisher.py", line 213, in handler
    published = publish_object(req, object)
  File "/opt/csw/lib/python2.3/site-packages/mod_python/publisher.py", line 412, in publish_object
    return publish_object(req,util.apply_fs_data(object, req.form, req=req))
  File "/opt/csw/lib/python2.3/site-packages/mod_python/util.py", line 439, in apply_fs_data
    return object(**args)
  File "/home/www/checkoutapp.com/docs/register/buy.py", line 36, in index
    register.name = converter(data['first_name'] + ' ' + data['last_name'])
KeyError: 'first_name'