[mod_python] File upload - AttributeError using the FieldStorage object

Before stating my problem, let me say that I am running apache version 2.0.52, mod_python 3.2.8, python 2.3, all on Redhat Enterprise Linux WS release 4.

I am new to mod_python and even python itself, but I am trying to upload a file and it's not working. Right now I wanted to write a practice program that just dumps the text in the file to a webpage, but eventually I would like to manipulate the data in the file someway and output something different. I am certain my html is fine... I have:
<form action='upload.py' method='post' enctype='multipart/form-data'>
	<input type='file' name='input_file'><br><br>
	<input type='submit'>
</form>

Originally I tried using the publisher handler, so my "action" was pointing to a different file and method that handles the request. To access the FieldStorage object I used req.form. But to correspond to the html above, I made "upload" my PythonHandler and created my own FieldStorage object as follows:

def handler(req):
    fields = util.FieldStorage(req)
    f = fields['input_file']

>From my understanding, the variable "f" should contain a Field object, NOT a FieldString as I am getting. So when I say f.file or f.filename, an AttributeError is raised because (of course) a FieldString does not have the attributes file or filename.

I looked around a lot online, but this seems to be an old problem with earlier versions of mod_python, but I am running 3.2.8. Could there still be a problem witht the __getitem__ method or the FieldStorage not being able to recognize the mime type (although the documentation states this problem has been fixed).

Help would be much appreciated, so thanks in advance